Replaces UglifyJS by Tearser, as it supports es6. Adds missing item to collection breadcrumb

package.json

@@ -39,7 +39,7 @@
     "postcss-loader": "^3.0.0",
     "sass-loader": "^7.1.0",
     "style-loader": "^0.23.1",
-    "uglifyjs-webpack-plugin": "^2.0.1",
+    "terser-webpack-plugin": "^1.1.0",
     "vue-custom-element": "^3.2.6",
     "vue-loader": "^15.4.2",
     "vue-template-compiler": "^2.5.17",

src/admin/components/navigation/tainacan-collection-subheader.vue

@@ -29,6 +29,10 @@
                                 tag="a" 
                                 :to="$routerHelper.getCollectionsPath()">{{ $i18n.get('repository') }}</router-link>
                         &nbsp;>&nbsp; 
+                        <router-link 
+                                tag="a" 
+                                :to="$routerHelper.getCollectionsPath()">{{ $i18n.get('collections') }}</router-link>
+                        &nbsp;>&nbsp; 
                         <router-link 
                                 tag="a" 
                                 :to="{ path: collectionBreadCrumbItem.url, query: { fromBreadcrumb: true }}">{{ collectionBreadCrumbItem.name }}</router-link> 

webpack.config.js

@@ -79,7 +79,7 @@ module.exports = {
 const production = false;
 
 if (production === true) {
-    const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+    const TerserPlugin = require('terser-webpack-plugin');
 
     console.log(`Production: ${production}`);
 
@@ -93,7 +93,7 @@ if (production === true) {
                 NODE_ENV: JSON.stringify('production')
             }
         }),
-        new UglifyJsPlugin({
+        new TerserPlugin({
             parallel: true,
             sourceMap: false
         }),