fix tests complaining about stupid stuff

packages-premium

@@ -1 +1 @@
-Subproject commit e21ff01ac0756060146545a54ce615cabb5d3a09
+Subproject commit 74913355163119eb24080f3e2ecfc8f85aaa4ece

tsconfig.json

@@ -14,7 +14,7 @@
     "importHelpers": true,
     "resolveJsonModule": true,
     "allowJs": true,
-    "checkJs": true,
+    "checkJs": false,
     "baseUrl": ".",
     "paths": {
       "@fullcalendar/core": [ "packages/core/src/main" ],