Revert "Add skipLibCheck to tsconfig."

This reverts commit f215392.

Author: RobinTail

tsconfig.base.json

@@ -9,7 +9,6 @@
     "declaration": true,
     "sourceMap": true,
     "declarationMap": true,
-    "types": [],
-    "skipLibCheck": true
+    "types": []
   }
-}
+}