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-INFLIGHT-6095116
- https://snyk.io/vuln/SNYK-JS-MICROMATCH-6838728
- https://snyk.io/vuln/SNYK-JS-UNSETVALUE-2400660

package.json

@@ -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",