add missing/implicit dependencies

otherwise will need to include `--shamefully-hoist` flag when installing with pnpm

Author: beenotung

package.json

@@ -31,6 +31,7 @@
     "@ionic-native/splash-screen": "5.0.0-beta.15",
     "@ionic-native/status-bar": "5.0.0-beta.15",
     "@ionic/angular": "^6.0.0-rc.2",
+    "@ionic/core": "^6.0.0-rc.2",
     "@ionic/storage": "^2.1.3",
     "cordova-android": "^8.1.0",
     "cordova-ios": "^5.1.1",
@@ -42,6 +43,7 @@
     "cordova-plugin-statusbar": "^2.4.3",
     "cordova-plugin-whitelist": "^1.3.4",
     "core-js": "^3.6.4",
+    "ionicons": "^5.5.4",
     "rxjs": "^6.5.4",
     "sw-toolbox": "3.6.0",
     "swiper": "^7.2.0",