chore: 🤖 migrate to vue cli 3

package.json

@@ -2,16 +2,13 @@
   "name": "vue-tree-list",
   "version": "1.4.0",
   "description": "A vue component for tree structure. Support adding treenode/leafnode, editing node's name and dragging.",
-  "main": "dist/vue-tree-list.min.js",
+  "main": "dist/vue-tree-list.umd.min.js",
   "scripts": {
     "commit": "npx git-cz",
-    "standard": "standard",
-    "test": "karma start --single-run",
-    "unit": "karma start --watch",
-    "coveralls": "npm run test -- --report lcovonly && cat ./coverage/lcov.info | coveralls",
-    "build": "webpack --config build/webpack.build.conf.js",
-    "dev": "webpack-dev-server --config build/webpack.dev.conf.js",
-    "prepublishOnly": "npm run build"
+    "serve": "vue-cli-service serve dev",
+    "build": "vue-cli-service build --target lib src/index.js",
+    "lint": "vue-cli-service lint",
+    "prepublish": "npm run build"
   },
   "repository": {
     "type": "git",
@@ -27,40 +24,39 @@
     "url": "https://github.com/ParadeTo/vue-tree-list/issues"
   },
   "homepage": "https://github.com/ParadeTo/vue-tree-list#readme",
+  "dependencies": {
+    "core-js": "^3.4.3",
+    "vue": "^2.6.10"
+  },
   "devDependencies": {
-    "@commitlint/cli": "^7.2.1",
-    "@commitlint/config-conventional": "^7.1.2",
-    "autoprefixer": "^6.4.0",
-    "babel-core": "^6.0.0",
-    "babel-eslint": "^7.0.0",
-    "babel-loader": "^6.0.0",
-    "babel-plugin-istanbul": "^3.0.0",
-    "babel-plugin-transform-runtime": "^6.0.0",
-    "babel-preset-es2015": "^6.0.0",
-    "babel-preset-stage-2": "^6.0.0",
-    "babel-register": "^6.0.0",
-    "chai": "^3.5.0",
-    "cross-env": "^5.0.1",
-    "css-loader": "^0.26.2",
-    "cz-conventional-changelog": "^2.1.0",
-    "file-loader": "^0.10.1",
-    "html-webpack-plugin": "^2.8.1",
-    "husky": "^1.2.0",
-    "isparta": "^4.0.0",
-    "isparta-loader": "^2.0.0",
-    "less": "^2.7.2",
-    "less-loader": "^2.2.3",
-    "sinon": "^2.3.5",
-    "sinon-chai": "^2.11.0",
-    "sourcemap": "^0.1.0",
-    "standard": "^12.0.1",
-    "url-loader": "^0.5.7",
-    "vue": "^2.6.6",
-    "vue-loader": "^11.1.3",
-    "vue-style-loader": "^2.0.3",
-    "vue-template-compiler": "^2.6.6",
-    "webpack": "^1.13.2",
-    "webpack-dev-server": "1.14.0",
-    "webpack-merge": "^0.14.1"
-  }
+    "@vue/cli-plugin-babel": "^4.1.0",
+    "@vue/cli-plugin-eslint": "^4.1.0",
+    "@vue/cli-service": "^4.1.0",
+    "babel-eslint": "^10.0.3",
+    "eslint": "^5.16.0",
+    "eslint-plugin-vue": "^5.0.0",
+    "less": "^3.10.3",
+    "less-loader": "^5.0.0",
+    "vue-template-compiler": "^2.6.10"
+  },
+  "eslintConfig": {
+    "root": true,
+    "env": {
+      "node": true
+    },
+    "extends": [
+      "plugin:vue/essential",
+      "eslint:recommended"
+    ],
+    "rules": {
+      "no-console": "warn"
+    },
+    "parserOptions": {
+      "parser": "babel-eslint"
+    }
+  },
+  "browserslist": [
+    "> 1%",
+    "last 2 versions"
+  ]
 }