Backend: Upgrade dependencies

server/package.json

@@ -43,38 +43,39 @@
   "dependencies": {
     "express": "4.17.1",
     "express-rate-limit": "^5.1.3",
-    "express-static-gzip": "^2.0.7",
-    "helmet": "^3.23.3",
+    "express-static-gzip": "^2.0.8",
+    "helmet": "^4.1.0",
     "http-proxy-middleware": "^1.0.5",
+    "nocache": "^2.1.0",
     "node-cache": "^5.1.2",
     "node-fetch": "^2.6.0",
     "serve-favicon": "^2.5.0",
     "winston": "3.3.3"
   },
   "devDependencies": {
-    "@types/express": "4.17.7",
-    "@types/express-rate-limit": "^5.0.0",
-    "@types/helmet": "^0.0.47",
+    "@types/express": "4.17.8",
+    "@types/express-rate-limit": "^5.1.0",
+    "@types/helmet": "^0.0.48",
     "@types/http-proxy-middleware": "^0.19.3",
-    "@types/jest": "26.0.4",
-    "@types/node": "14.0.22",
+    "@types/jest": "26.0.13",
+    "@types/node": "14.6.4",
     "@types/node-cache": "^4.2.5",
     "@types/node-fetch": "2.5.7",
     "@types/serve-favicon": "^2.5.0",
     "@types/supertest": "^2.0.10",
     "@types/winston": "^2.4.4",
-    "@typescript-eslint/eslint-plugin": "^3.6.0",
-    "@typescript-eslint/parser": "^3.6.0",
+    "@typescript-eslint/eslint-plugin": "^4.0.1",
+    "@typescript-eslint/parser": "^4.0.1",
     "copyfiles": "^2.3.0",
     "cross-env": "^7.0.2",
     "echo-cli": "^1.0.8",
-    "eslint": "^7.4.0",
-    "jest": "26.1.0",
+    "eslint": "^7.8.1",
+    "jest": "26.4.2",
     "mkdirp": "^1.0.3",
     "rimraf": "^3.0.2",
     "supertest": "^4.0.2",
-    "ts-jest": "26.1.1",
-    "tslib": "2.0.0",
-    "typescript": "3.9.6"
+    "ts-jest": "26.3.0",
+    "tslib": "2.0.1",
+    "typescript": "4.0.2"
   }
 }

server/src/srv/server.ts

@@ -51,7 +51,6 @@ class Server {
     this.m_app.use([
       helmet(isProduction()? {
         contentSecurityPolicy: {
-          browserSniff: false,
           directives: {
             frameSrc: ["'self'"],
             defaultSrc: ["'self'"],