chore: dependencies update

- update `@angular-devkit/build-angular` to `^0.803.12`
- update `@angular-devkit/build-ng-packagr` to `^0.803.12`
- update `@angular/cli` to `^8.3.12`
- update `karma` to `^4.4.0`

Author: xidedix

package.json

@@ -41,9 +41,9 @@
     "zone.js": "^0.10.2"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^0.803.10",
-    "@angular-devkit/build-ng-packagr": "^0.803.10",
-    "@angular/cli": "^8.3.10",
+    "@angular-devkit/build-angular": "^0.803.12",
+    "@angular-devkit/build-ng-packagr": "^0.803.12",
+    "@angular/cli": "^8.3.12",
     "@angular/compiler-cli": "^8.2.11",
     "@angular/language-service": "^8.2.11",
     "@types/jasmine": "^3.4.4",
@@ -52,7 +52,7 @@
     "codelyzer": "^5.1.2",
     "jasmine-core": "~3.4.0",
     "jasmine-spec-reporter": "~4.2.1",
-    "karma": "^4.3.0",
+    "karma": "^4.4.0",
     "karma-chrome-launcher": "~2.2.0",
     "karma-coverage-istanbul-reporter": "^2.1.0",
     "karma-jasmine": "~2.0.1",