diff --git a/package-lock.json b/package-lock.json
index c428491..30e7bd4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3690,7 +3690,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -3708,11 +3709,13 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -3725,15 +3728,18 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -3836,7 +3842,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -3846,6 +3853,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -3858,17 +3866,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -3885,6 +3896,7 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -3957,7 +3969,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -3967,6 +3980,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -4042,7 +4056,8 @@
         },
         "safe-buffer": {
           "version": "5.1.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -4072,6 +4087,7 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -4089,6 +4105,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -4127,11 +4144,13 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         }
       }
     },
@@ -4583,9 +4602,9 @@
       "dev": true
     },
     "http-proxy": {
-      "version": "1.18.0",
-      "resolved": "https://registry.npmjs.org/http-proxy/-/http-proxy-1.18.0.tgz",
-      "integrity": "sha512-84I2iJM/n1d4Hdgc6y2+qY5mDaz2PUVjlg9znE9byl+q0uC3DeByqBGReQu5tpLK0TAqTIXScRUV+dg7+bUPpQ==",
+      "version": "1.18.1",
+      "resolved": "https://registry.npmjs.org/http-proxy/-/http-proxy-1.18.1.tgz",
+      "integrity": "sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==",
       "dev": true,
       "requires": {
         "eventemitter3": "^4.0.0",
@@ -7992,7 +8011,8 @@
             "ansi-regex": {
               "version": "2.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "ansi-styles": {
               "version": "2.2.1",
@@ -8049,7 +8069,8 @@
             "balanced-match": {
               "version": "0.4.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "bcrypt-pbkdf": {
               "version": "1.0.0",
@@ -8064,6 +8085,7 @@
               "version": "0.0.9",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "inherits": "~2.0.0"
               }
@@ -8072,6 +8094,7 @@
               "version": "2.10.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "hoek": "2.x.x"
               }
@@ -8080,6 +8103,7 @@
               "version": "1.1.6",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "balanced-match": "^0.4.1",
                 "concat-map": "0.0.1"
@@ -8088,7 +8112,8 @@
             "buffer-shims": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "caseless": {
               "version": "0.11.0",
@@ -8120,12 +8145,14 @@
             "code-point-at": {
               "version": "1.1.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "combined-stream": {
               "version": "1.0.5",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "delayed-stream": "~1.0.0"
               }
@@ -8142,17 +8169,20 @@
             "concat-map": {
               "version": "0.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "console-control-strings": {
               "version": "1.1.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "core-util-is": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "cryptiles": {
               "version": "2.0.5",
@@ -8198,7 +8228,8 @@
             "delayed-stream": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "delegates": {
               "version": "1.0.0",
@@ -8230,7 +8261,8 @@
             "extsprintf": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "forever-agent": {
               "version": "0.6.1",
@@ -8252,12 +8284,14 @@
             "fs.realpath": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "fstream": {
               "version": "1.0.10",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "graceful-fs": "^4.1.2",
                 "inherits": "~2.0.0",
@@ -8329,6 +8363,7 @@
               "version": "7.1.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "fs.realpath": "^1.0.0",
                 "inflight": "^1.0.4",
@@ -8341,7 +8376,8 @@
             "graceful-fs": {
               "version": "4.1.11",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "graceful-readlink": {
               "version": "1.0.1",
@@ -8391,7 +8427,8 @@
             "hoek": {
               "version": "2.16.3",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "http-signature": {
               "version": "1.1.1",
@@ -8408,6 +8445,7 @@
               "version": "1.0.6",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "once": "^1.3.0",
                 "wrappy": "1"
@@ -8416,7 +8454,8 @@
             "inherits": {
               "version": "2.0.3",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "ini": {
               "version": "1.3.4",
@@ -8428,6 +8467,7 @@
               "version": "1.0.0",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "number-is-nan": "^1.0.0"
               }
@@ -8459,7 +8499,8 @@
             "isarray": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "isstream": {
               "version": "0.1.2",
@@ -8514,12 +8555,14 @@
             "mime-db": {
               "version": "1.25.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "mime-types": {
               "version": "2.1.13",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "mime-db": "~1.25.0"
               }
@@ -8528,6 +8571,7 @@
               "version": "3.0.3",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "brace-expansion": "^1.0.0"
               }
@@ -8535,12 +8579,14 @@
             "minimist": {
               "version": "0.0.8",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -8592,7 +8638,8 @@
             "number-is-nan": {
               "version": "1.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "oauth-sign": {
               "version": "0.8.2",
@@ -8610,6 +8657,7 @@
               "version": "1.4.0",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -8617,7 +8665,8 @@
             "path-is-absolute": {
               "version": "1.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "pinkie": {
               "version": "2.0.4",
@@ -8637,7 +8686,8 @@
             "process-nextick-args": {
               "version": "1.0.7",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "punycode": {
               "version": "1.4.1",
@@ -8718,6 +8768,7 @@
               "version": "2.5.4",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "glob": "^7.0.5"
               }
@@ -8778,6 +8829,7 @@
               "version": "1.0.2",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "code-point-at": "^1.0.0",
                 "is-fullwidth-code-point": "^1.0.0",
@@ -8787,7 +8839,8 @@
             "string_decoder": {
               "version": "0.10.31",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "stringstream": {
               "version": "0.0.5",
@@ -8799,6 +8852,7 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -8819,6 +8873,7 @@
               "version": "2.2.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "block-stream": "*",
                 "fstream": "^1.0.2",
@@ -8897,7 +8952,8 @@
             "util-deprecate": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "uuid": {
               "version": "3.0.1",
@@ -8926,7 +8982,8 @@
             "wrappy": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "xtend": {
               "version": "4.0.1",
diff --git a/yarn.lock b/yarn.lock
index df49113..2b66417 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2195,9 +2195,9 @@ event-stream@~3.3.0:
     stream-combiner "~0.0.4"
     through "~2.3.1"
 
-eventemitter3@1.x.x:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-1.2.0.tgz#1c86991d816ad1e504750e73874224ecf3bec508"
+eventemitter3@^4.0.0:
+  version "4.0.7"
+  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
 
 events@^1.0.0:
   version "1.1.1"
@@ -2434,6 +2434,10 @@ flow-bin@^0.64.0:
   version "0.64.0"
   resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.64.0.tgz#ddd3fb3b183ab1ab35a5d5dec9caf5ebbcded167"
 
+follow-redirects@^1.0.0:
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.0.tgz#b42e8d93a2a7eea5ed88633676d6597bc8e384db"
+
 for-in@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -2779,11 +2783,12 @@ http-proxy-middleware@0.17.3, http-proxy-middleware@~0.17.1:
     micromatch "^2.3.11"
 
 http-proxy@^1.16.2:
-  version "1.16.2"
-  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.16.2.tgz#06dff292952bf64dbe8471fa9df73066d4f37742"
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.18.1.tgz#401541f0534884bbf95260334e72f88ee3976549"
   dependencies:
-    eventemitter3 "1.x.x"
-    requires-port "1.x.x"
+    eventemitter3 "^4.0.0"
+    follow-redirects "^1.0.0"
+    requires-port "^1.0.0"
 
 http-signature@~1.1.0:
   version "1.1.1"
@@ -5171,7 +5176,7 @@ require-uncached@^1.0.2:
     caller-path "^0.1.0"
     resolve-from "^1.0.0"
 
-requires-port@1.0.x, requires-port@1.x.x:
+requires-port@1.0.x, requires-port@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"