upgrade to yarn 2

.gitignore

@@ -21,3 +21,26 @@ yarn-error.log*
 *.sw?
 
 coverage
+
+
+# Created by https://www.toptal.com/developers/gitignore/api/yarn
+# Edit at https://www.toptal.com/developers/gitignore?templates=yarn
+
+### yarn ###
+# https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored
+
+.yarn/*
+!.yarn/releases
+!.yarn/patches
+!.yarn/plugins
+!.yarn/sdks
+!.yarn/versions
+
+# if you are NOT using Zero-installs, then:
+# comment the following lines
+#!.yarn/cache
+
+# and uncomment the following lines
+.pnp.*
+
+# End of https://www.toptal.com/developers/gitignore/api/yarn

.yarnrc.yml

@@ -0,0 +1,7 @@
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-interactive-tools.cjs
+    spec: "@yarnpkg/plugin-interactive-tools"
+
+yarnPath: .yarn/releases/yarn-3.2.0.cjs

package.json

@@ -14,7 +14,6 @@
     "prepublish": "npm run build"
   },
   "main": "dist/vue-tree-list.umd.min.js",
-  "dependencies": {},
   "devDependencies": {
     "@vue/cli-plugin-babel": "^4.1.0",
     "@vue/cli-plugin-eslint": "^4.1.0",
@@ -59,5 +58,6 @@
   "repository": {
     "type": "git",
     "url": "git+https://github.com/ParadeTo/vue-tree-list.git"
-  }
+  },
+  "packageManager": "yarn@3.2.0"
 }