fix: upgrade @ionic/angular from 7.6.3 to 7.6.4

Snyk has created this PR to upgrade @ionic/angular from 7.6.3 to 7.6.4.

See this package in npm:
https://www.npmjs.com/package/@ionic/angular

See this project in Snyk:
https://app.snyk.io/org/tdittmann/project/2a13fc6f-de47-414d-8b8b-8e9390550636?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -36,7 +36,7 @@
     "@capacitor/push-notifications": "5.1.0",
     "@capacitor/splash-screen": "5.0.6",
     "@capacitor/status-bar": "5.0.6",
-    "@ionic/angular": "7.6.3",
+    "@ionic/angular": "7.6.4",
     "@ionic/storage-angular": "4.0.0",
     "core-js": "3.35.0",
     "moment": "2.30.1",