update to ionic 6

package.json

@@ -95,7 +95,8 @@
     "@ionic-native/status-bar": "^5.0.0",
     "@ionic-native/streaming-media": "^5.36.0",
     "@ionic-native/wheel-selector": "^5.31.1",
-    "@ionic/core": "^5.8.1",
+    "@ionic/angular": "^6.7.5",
+    "@ionic/core": "^6.7.5",
     "@ionic/pwa-elements": "^3.0.2",
     "@ionic/storage": "^2.3.1",
     "@ionic/storage-angular": "^3.0.6",