chore: update angular references in plugin

Author: Elena Hristova

src/package.json

@@ -55,16 +55,16 @@
   "homepage": "https://github.com/NativeScript/nativescript-datetimepicker",
   "readmeFilename": "README.md",
   "devDependencies": {
-    "@angular/common": "~8.0.0",
-    "@angular/compiler": "~8.0.0",
-    "@angular/compiler-cli": "~8.0.0",
-    "@angular/core": "~8.0.0",
-    "@angular/forms": "~8.0.0",
-    "@angular/platform-browser": "~8.0.0",
-    "@angular/platform-browser-dynamic": "~8.0.0",
-    "@angular/router": "~8.0.0",
-    "nativescript-angular": "~8.0.0",
-    "nativescript-vue": "~2.2.0",
+    "@angular/common": "~8.2.0",
+    "@angular/compiler": "~8.2.0",
+    "@angular/compiler-cli": "~8.2.0",
+    "@angular/core": "~8.2.0",
+    "@angular/forms": "~8.2.0",
+    "@angular/platform-browser": "~8.2.0",
+    "@angular/platform-browser-dynamic": "~8.2.0",
+    "@angular/router": "~8.2.0",
+    "nativescript-angular": "~8.20.0",
+    "nativescript-vue": "~2.4.0",
     "prompt": "^1.0.0",
     "rimraf": "^2.6.2",
     "rxjs": "^6.3.3",