Update @polakdot/api and types dependencies (paritytech#280)

* update polkadot/types

* update test dependencies as well

Author: joelamouche

moonbeam-types-bundle/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "moonbeam-types-bundle",
-  "version": "1.1.9",
+  "version": "1.1.10",
   "description": "Bundled types to instantiate the Polkadot JS api with a Moonbeam network",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -23,7 +23,7 @@
     "url": "git+https://github.com/PureStake/moonbeam.git"
   },
   "dependencies": {
-    "@polkadot/types": "^3.9.3",
+    "@polkadot/types": "^4.0.3",
     "typescript": "^4.1.3"
   }
 }