Bump berry (#407)

* Bump berry

* rewrite

.yarnrc.yml

@@ -9,7 +9,5 @@ plugins:
     spec: "@yarnpkg/plugin-interactive-tools"
   - path: .yarn/plugins/@yarnpkg/plugin-version.cjs
     spec: "@yarnpkg/plugin-version"
-  - path: .yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs
-    spec: "@yarnpkg/plugin-workspace-tools"
 
-yarnPath: .yarn/releases/yarn-2.3.3.cjs
+yarnPath: .yarn/releases/yarn-2.4.0.cjs

package.json

@@ -29,7 +29,7 @@
   "devDependencies": {
     "@babel/core": "^7.12.9",
     "@babel/runtime": "^7.12.5",
-    "@polkadot/dev": "^0.60.5",
+    "@polkadot/dev": "^0.60.6",
     "@polkadot/ts": "^0.3.55",
     "@types/jest": "^26.0.15",
     "babel-plugin-transform-vue-template": "^0.4.2",