Update cordova-plugin-splashscreen to version 5.0.4

Author: depfu[bot]

front-end/package-lock.json

@@ -55,7 +55,7 @@
     "cordova-plugin-device": "^2.0.2",
     "cordova-plugin-ionic-keyboard": "^2.1.3",
     "cordova-plugin-ionic-webview": "^3.1.2",
-    "cordova-plugin-splashscreen": "^5.0.2",
+    "cordova-plugin-splashscreen": "^5.0.4",
     "cordova-plugin-statusbar": "^2.4.3",
     "cordova-plugin-whitelist": "^1.3.5",
     "jasmine-core": "~3.8.0",