fix(ssr): fix window references

src/@ionic-native/plugins/geofence/index.ts

@@ -147,7 +147,7 @@ export class Geofence extends IonicNativePlugin {
    */
   onNotificationClicked(): Observable<any> {
     return new Observable<any>(observer => {
-      window &&
+      typeof window !== 'undefined' &&
         window.geofence &&
         (window.geofence.onNotificationClicked = observer.next.bind(observer));
       return () => (window.geofence.onNotificationClicked = () => {});

src/@ionic-native/plugins/in-app-browser/index.ts

@@ -129,7 +129,9 @@ export class InAppBrowserObject {
 
       this._objectInstance = cordova.InAppBrowser.open(url, target, options);
     } catch (e) {
-      window.open(url, target);
+      if (typeof window !== 'undefined') {
+        window.open(url, target);
+      }
       console.warn(
         'Native: InAppBrowser is not installed or you are running on a browser. Falling back to window.open.'
       );

src/@ionic-native/plugins/push/index.ts

@@ -391,7 +391,9 @@ export class PushObject {
     if (
       checkAvailability('PushNotification', 'init', 'PushNotification') === true
     ) {
-      this._objectInstance = window.PushNotification.init(options);
+      if (typeof window !== 'undefined') {
+        this._objectInstance = window.PushNotification.init(options);
+      }
     }
   }
 

src/@ionic-native/plugins/themeable-browser/index.ts

@@ -85,7 +85,9 @@ export class ThemeableBrowserObject {
         styleOptions
       );
     } catch (e) {
-      window.open(url);
+      if (typeof window !== 'undefined') {
+        window.open(url);
+      }
       console.warn(
         'Native: ThemeableBrowser is not installed or you are running on a browser. Falling back to window.open.'
       );