Fix build errors

Author: jakezatecky

package.json

@@ -19,13 +19,13 @@
   "main": "lib/index.js",
   "browser": "lib/index.browser.js",
   "scripts": {
-    "build-less": "lessc src/less/react-dual-listbox.less .css-compare/less.css",
+    "build-less": "lessc src/less/react-checkbox-tree.less .css-compare/less.css",
     "build-script": "npm run build-script-node && npm run build-script-web",
     "build-script-node": "webpack --env=target=node",
     "build-script-web": "webpack --env=target=web",
-    "build-sass": "sass src/scss/react-dual-listbox.scss lib/react-dual-listbox.css && cp lib/react-dual-listbox.css .css-compare/scss.css",
+    "build-sass": "sass src/scss/react-checkbox-tree.scss lib/react-checkbox-tree.css && cp lib/react-checkbox-tree.css .css-compare/scss.css",
     "build-style": "npm run build-less && npm run build-sass && npm run build-style-autoprefix",
-    "build-style-autoprefix": "postcss lib/react-dual-listbox.css --use autoprefixer --output lib/react-dual-listbox.css",
+    "build-style-autoprefix": "postcss lib/react-checkbox-tree.css --use autoprefixer --output lib/react-checkbox-tree.css",
     "build": "npm run build-script && npm run build-style",
     "examples": "webpack serve --config=webpack.config.test.js",
     "gh-build": "webpack --config=webpack.config.test.js --mode=production",

postcss.config.js

@@ -0,0 +1,10 @@
+// eslint-disable-next-line import/no-extraneous-dependencies
+const cssnano = require('cssnano');
+
+module.exports = {
+    plugins: [
+        cssnano({
+            discardComments: true,
+        }),
+    ],
+};