chore: upgrade to angular 9 dependencies

Author: kyubisation

package-lock.json

@@ -51,10 +51,10 @@
   },
   "homepage": "https://github.com/kyubisation/angular-server-side-configuration#readme",
   "devDependencies": {
-    "@angular-devkit/architect": "~0.900.0-rc.11",
-    "@angular-devkit/core": "^9.0.0-rc.11",
-    "@angular-devkit/schematics": "^9.0.0-rc.11",
-    "@schematics/angular": "^9.0.0-rc.11",
+    "@angular-devkit/architect": "~0.900.0",
+    "@angular-devkit/core": "^9.0.0",
+    "@angular-devkit/schematics": "^9.0.0",
+    "@schematics/angular": "^9.0.0",
     "@types/glob-to-regexp": "^0.4.0",
     "@types/jest": "^24.9.1",
     "@types/node": "^10.17.14",