fix: frontend/package.json, frontend/yarn.lock & frontend/.snyk to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746
- https://snyk.io/vuln/SNYK-JS-LODASH-590103
- https://snyk.io/vuln/SNYK-JS-LODASH-608086
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-674311
- https://snyk.io/vuln/SNYK-JS-SANITIZEHTML-585892
- https://snyk.io/vuln/SNYK-JS-SERIALIZEJAVASCRIPT-570062
- https://snyk.io/vuln/SNYK-JS-SOCKJS-575261
- https://snyk.io/vuln/SNYK-JS-YARGSPARSER-560381

The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746

frontend/package.json

@@ -10,7 +10,9 @@
     "lint:fix": "yarn lint --fix",
     "pretty": "prettier --write \"src/**/*.{ts,tsx}\"",
     "test": "yarn lint && react-scripts test --ci",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "snyk-protect": "snyk protect",
+    "prepare": "yarn run snyk-protect"
   },
   "husky": {
     "hooks": {
@@ -32,11 +34,11 @@
     "@blueprintjs/select": "^3.12.3",
     "classnames": "^2.2.6",
     "connected-react-router": "^6.5.2",
-    "cross-fetch": "^3.0.4",
+    "cross-fetch": "^3.0.6",
     "cytoscape": "^3.15.0",
     "cytoscape-popper": "^1.0.7",
     "inflection": "^1.12.0",
-    "lodash": "^4.17.15",
+    "lodash": "^4.17.20",
     "moment": "^2.25.3",
     "normalize.css": "^8.0.0",
     "numeral": "^2.0.6",
@@ -44,14 +46,14 @@
     "react-dom": "^16.10.2",
     "react-redux": "^7.1.1",
     "react-router-dom": "^5.2.0",
-    "react-scripts": "3.4.1",
     "react-sigma": "^1.2.30",
     "react-virtualized": "^9.21.1",
     "redux": "^4.0.4",
     "redux-thunk": "^2.3.0",
-    "sanitize-html": "^1.20.1",
+    "sanitize-html": "^2.0.0",
     "styled-components": "^5.1.0",
-    "tippy.js": "^4.3.5"
+    "tippy.js": "^4.3.5",
+    "snyk": "^1.410.0"
   },
   "devDependencies": {
     "@types/classnames": "^2.2.9",
@@ -81,6 +83,7 @@
     "lint-staged": "^10.2.4",
     "prettier": "^2.0.5",
     "react-axe": "3.3.0",
+    "react-scripts": "3.4.3",
     "typescript": "^3.9.2"
   },
   "browserslist": [
@@ -88,5 +91,6 @@
     "not dead",
     "not ie <= 11",
     "not op_mini all"
-  ]
+  ],
+  "snyk": true
 }