diff --git a/package-lock.json b/package-lock.json
index 992af0c..b8f8801 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
         "highlight.js": "^9.15.10",
         "html-to-md": "^0.3.2",
         "jquery": "^3.4.1",
-        "jsdom": "^15.2.1",
+        "jsdom": "^16.5.0",
         "katex": "^0.11.1",
         "markdown-it": "^10.0.0",
         "markdown-it-abbr": "^1.0.4",
@@ -301,16 +301,14 @@
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/abab/-/abab-2.0.6.tgz",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.6.tgz",
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-      "deprecated": "Use your platform's native atob() and btoa() methods instead",
-      "license": "BSD-3-Clause"
+      "deprecated": "Use your platform's native atob() and btoa() methods instead"
     },
     "node_modules/acorn": {
-      "version": "7.4.1",
-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/acorn/-/acorn-7.4.1.tgz",
-      "integrity": "sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==",
-      "license": "MIT",
+      "version": "8.11.3",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.11.3.tgz",
+      "integrity": "sha512-Y9rRfJG5jcKOE0CLisYbojUjIrIEE7AGMzA/Sm4BslANhbS+cDMpgBdcPT91oJ7OuJ9hYJBx59RjbhxVnrF8Xg==",
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -319,20 +317,18 @@
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/acorn-globals/-/acorn-globals-4.3.4.tgz",
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-      "license": "MIT",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-6.0.0.tgz",
+      "integrity": "sha512-ZQl7LOWaF5ePqqcX4hLuv/bLXYQNfNWw2c0/yX/TsPRKamzHcTGQnlCjHT3TsmkOUVEPS3crCxiPfdzE/Trlhg==",
       "dependencies": {
-        "acorn": "^6.0.1",
-        "acorn-walk": "^6.0.1"
+        "acorn": "^7.1.1",
+        "acorn-walk": "^7.1.1"
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     "node_modules/acorn-globals/node_modules/acorn": {
-      "version": "6.4.2",
-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/acorn/-/acorn-6.4.2.tgz",
-      "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
-      "license": "MIT",
+      "version": "7.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.1.tgz",
+      "integrity": "sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==",
       "bin": {
         "acorn": "bin/acorn"
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@@ -341,10 +337,9 @@
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/acorn-walk/-/acorn-walk-6.2.0.tgz",
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-      "license": "MIT",
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.2.0.tgz",
+      "integrity": "sha512-OPdCF6GsMIP+Az+aWfAAOEt2/+iVDKE7oy6lJ098aoe59oAmK76qV6Gw60SbZ8jHuG2wH058GF4pLFbYamYrVA==",
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@@ -490,15 +485,6 @@
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/array-equal/-/array-equal-1.0.2.tgz",
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-      "license": "MIT",
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@@ -1246,14 +1232,16 @@
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-      "license": "MIT",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-2.0.0.tgz",
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-        "whatwg-mimetype": "^2.2.0",
-        "whatwg-url": "^7.0.0"
+        "abab": "^2.0.3",
+        "whatwg-mimetype": "^2.3.0",
+        "whatwg-url": "^8.0.0"
+      },
+      "engines": {
+        "node": ">=10"
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@@ -1286,6 +1274,11 @@
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+    "node_modules/decimal.js": {
+      "version": "10.4.3",
+      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.4.3.tgz",
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+    },
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       "resolved": "https://mirrors.huaweicloud.com/repository/npm/decompress-response/-/decompress-response-3.3.0.tgz",
@@ -1309,12 +1302,6 @@
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-      "version": "0.1.4",
-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/deep-is/-/deep-is-0.1.4.tgz",
-      "integrity": "sha512-oIPzksmTg4/MriiaYGO+okXDT7ztn/w3Eptv/+gSIdMdKsJo0u4CfYNFJPy+4SKMuCqGw2wxnA+URMg3t8a/bQ==",
-      "license": "MIT"
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@@ -1419,13 +1406,23 @@
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/domexception/-/domexception-1.0.1.tgz",
-      "integrity": "sha512-raigMkn7CJNNo6Ihro1fzG7wr3fHuYVytzquZKX5n0yizGsTcYgzdIUwj1X9pK0VvjeihV+XiclP+DjwbsSKug==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/domexception/-/domexception-2.0.1.tgz",
+      "integrity": "sha512-yxJ2mFy/sibVQlu5qHjOkf9J3K6zgmCxgJ94u2EdvDOV09H+32LtRswEcUsmUWN72pVLOEnTSRaIVVzVQgS0dg==",
       "deprecated": "Use your platform's native DOMException instead",
-      "license": "MIT",
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-        "webidl-conversions": "^4.0.2"
+        "webidl-conversions": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
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+    "node_modules/domexception/node_modules/webidl-conversions": {
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+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-5.0.0.tgz",
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+      "engines": {
+        "node": ">=8"
       }
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     "node_modules/dot-prop": {
@@ -1750,22 +1747,20 @@
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-      "license": "BSD-2-Clause",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-2.1.0.tgz",
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-        "estraverse": "^4.2.0",
-        "esutils": "^2.0.2",
-        "optionator": "^0.8.1"
+        "estraverse": "^5.2.0",
+        "esutils": "^2.0.2"
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       "bin": {
         "escodegen": "bin/escodegen.js",
         "esgenerate": "bin/esgenerate.js"
       },
       "engines": {
-        "node": ">=4.0"
+        "node": ">=6.0"
       },
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         "source-map": "~0.6.1"
@@ -1773,9 +1768,8 @@
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       "version": "4.0.1",
-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/esprima/-/esprima-4.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
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-      "license": "BSD-2-Clause",
       "bin": {
         "esparse": "bin/esparse.js",
         "esvalidate": "bin/esvalidate.js"
@@ -1785,19 +1779,17 @@
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-      "license": "BSD-2-Clause",
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+      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.3.0.tgz",
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       "version": "2.0.3",
-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/esutils/-/esutils-2.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
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@@ -1862,12 +1854,6 @@
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@@ -2152,12 +2138,14 @@
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-      "license": "MIT",
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       "dependencies": {
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+        "whatwg-encoding": "^1.0.5"
+      },
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+        "node": ">=10"
       }
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     "node_modules/html-to-md": {
@@ -2314,15 +2302,6 @@
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@@ -2395,6 +2374,11 @@
         "node": ">=8"
       }
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+    "node_modules/is-potential-custom-element-name": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-potential-custom-element-name/-/is-potential-custom-element-name-1.0.1.tgz",
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+    },
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@@ -2486,40 +2470,39 @@
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-        "domexception": "^1.0.1",
-        "escodegen": "^1.11.1",
-        "html-encoding-sniffer": "^1.0.2",
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+      "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-16.5.0.tgz",
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+        "acorn": "^8.0.5",
+        "acorn-globals": "^6.0.0",
+        "cssom": "^0.4.4",
+        "cssstyle": "^2.3.0",
+        "data-urls": "^2.0.0",
+        "decimal.js": "^10.2.1",
+        "domexception": "^2.0.1",
+        "escodegen": "^2.0.0",
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-        "w3c-xmlserializer": "^1.1.2",
-        "webidl-conversions": "^4.0.2",
+        "parse5": "6.0.1",
+        "request": "^2.88.2",
+        "request-promise-native": "^1.0.9",
+        "saxes": "^5.0.1",
+        "symbol-tree": "^3.2.4",
+        "tough-cookie": "^4.0.0",
+        "w3c-hr-time": "^1.0.2",
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-        "whatwg-url": "^7.0.0",
-        "ws": "^7.0.0",
+        "whatwg-url": "^8.0.0",
+        "ws": "^7.4.4",
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+        "node": ">=10"
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       "peerDependencies": {
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@@ -2670,19 +2653,6 @@
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@@ -3086,23 +3050,6 @@
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@@ -3385,6 +3317,11 @@
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@@ -3575,6 +3512,11 @@
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+        "url-parse": "^1.5.3"
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@@ -4246,6 +4185,15 @@
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@@ -4350,36 +4298,36 @@
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
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-      "resolved": "https://mirrors.huaweicloud.com/repository/npm/iconv-lite/-/iconv-lite-0.4.24.tgz",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
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@@ -4389,19 +4337,20 @@
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-      "license": "MIT"
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-      "license": "MIT",
+      "version": "8.7.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.7.0.tgz",
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-        "tr46": "^1.0.1",
-        "webidl-conversions": "^4.0.2"
+        "lodash": "^4.7.0",
+        "tr46": "^2.1.0",
+        "webidl-conversions": "^6.1.0"
+      },
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+        "node": ">=10"
       }
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@@ -4433,15 +4382,6 @@
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@@ -4512,9 +4452,8 @@
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-      "license": "Apache-2.0"
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
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@@ -4528,9 +4467,8 @@
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-      "license": "MIT"
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
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diff --git a/package.json b/package.json
index 91f9126..aa9c579 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
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     "html-to-md": "^0.3.2",
     "jquery": "^3.4.1",
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     "markdown-it": "^10.0.0",
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