feat(angular): angular 9 support (#19515)

* init ivy support

* chore(): angular prerelease

* chore: update

* updates

* angular 8 deps

* chore(angular): update sync script

* updates

* chore(): remove console log

* chore(): updates

* chore(): update release script

* fix(): remove comments

* fix(): remove test version

* fix(): failing angular test

* fix(): failing angular tests

* fix(): update ci steps

* fix(): fix sync script

* chore(): refactor angular proxies

* chore(): updates

* chore(): updates

* chore(): lint

* chore(): updates

* chore(ssr): check for window

* chore(): fix virtual scroll angular tests

* chore(): lint

* chore(): add server to link

* chore(scripts): update release script

* chore(): bump version check

* style(scripts): spacing

angular/src/app-initialize.ts

@@ -10,7 +10,7 @@ let didInitialize = false;
 export const appInitialize = (config: Config, doc: Document, zone: NgZone) => {
   return (): any => {
     const win: IonicWindow | undefined = doc.defaultView as any;
-    if (win) {
+    if (win && typeof (window as any) !== 'undefined') {
       if (didInitialize) {
         console.warn('Ionic Angular was already initialized. Make sure IonicModule.forRoot() is just called once.');
       }