restore clean webpack plugin

Author: offtherailz

package.json

@@ -46,6 +46,7 @@
     "babel-loader": "10.0.0",
     "babel-plugin-istanbul": "6.0.0",
     "babel-plugin-transform-imports": "2.0.0",
+    "clean-webpack-plugin": "^4.0.0",
     "copy-webpack-plugin": "5.0.2",
     "css-loader": "5.1.2",
     "css-minimizer-webpack-plugin": "3.0.2",
@@ -103,15 +104,15 @@
     },
     "scripts": {
         "postinstall": "node MapStore2/utility/build/postInstall.js",
-        "clean": "rimraf dist",
+        "clean": "premove dist",
         "compile": "npm run clean && mkdirp ./dist && node --max_old_space_size=2048 ./node_modules/webpack/bin/webpack.js --config prod-webpack.config.js --env.production",
         "fe:start": "webpack serve --progress --color --port 8081 --hot --inline --content-base .",
         "start": "concurrently -n frontend,backend -c green,blue \"npm:fe:start\" \"npm:be:start\"",
         "be:start": "npm run be:build && mvn cargo:run -f ./web/pom.xml",
         "be:build": "mvn clean install",
         "ext:startapp": "webpack serve --progress --color --port 8081 --hot --inline --content-base . --config build/extension/module.app.webpack.config.js",
         "ext:start": "webpack serve --progress --color --port 8082 --hot --inline --config build/extension/webpack.config.js",
-        "ext:build": "rimraf ./dist && mkdirp ./dist && webpack --progress  --color --config build/extension/prod-webpack.config.js",
+        "ext:build": "premove ./dist && mkdirp ./dist && webpack --progress  --color --config build/extension/prod-webpack.config.js",
         "test": "karma start ./karma.conf.single-run.js",
         "continuoustest": "karma start ./karma.conf.continuous-test.js",
         "mvntest": "karma start ./karma.conf.single-run.js --reporters junit,dots,coverage",