fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BRACES-6838727
- https://snyk.io/vuln/SNYK-JS-REQUEST-3361831
- https://snyk.io/vuln/SNYK-JS-TOUGHCOOKIE-5672873
- https://snyk.io/vuln/SNYK-JS-INFLIGHT-6095116
- https://snyk.io/vuln/SNYK-JS-MICROMATCH-6838728
- https://snyk.io/vuln/SNYK-JS-UNSETVALUE-2400660
- https://snyk.io/vuln/SNYK-JS-SEND-7926862
- https://snyk.io/vuln/SNYK-JS-SERVESTATIC-7926865

package.json

@@ -70,7 +70,7 @@
     "ngx-masonry": "1.1.4",
     "reflect-metadata": "0.1.12",
     "rxjs": "6.4.0",
-    "serve-static": "1.14.1",
+    "serve-static": "1.16.1",
     "snyk": "^1.334.0",
     "stacktracey": "1.2.122",
     "ts-action": "11.0.0",
@@ -98,7 +98,7 @@
     "dotenv": "6.2.0",
     "eslint": "6.1.0",
     "ineeda": "0.11.3",
-    "jest": "24.1.0",
+    "jest": "27.0.2",
     "jest-preset-angular": "7.0.1",
     "ng-packagr": "9.0.0",
     "prettier": "1.18.2",