Bump deps (#36)

package.json

@@ -9,7 +9,7 @@
   ],
   "resolutions": {
     "babel-core": "^7.0.0-bridge.0",
-    "typescript": "^3.6.2"
+    "typescript": "^3.6.3"
   },
   "scripts": {
     "build": "./scripts/build.sh",
@@ -20,9 +20,9 @@
     "test": "echo \"Tests included in build\""
   },
   "devDependencies": {
-    "@babel/core": "^7.5.5",
-    "@polkadot/dev": "^0.31.0-beta.7",
-    "@polkadot/util": "^1.2.0-beta.7",
+    "@babel/core": "^7.6.0",
+    "@polkadot/dev": "^0.31.0-beta.8",
+    "@polkadot/util": "^1.3.1",
     "override-require": "^1.1.1"
   }
 }