Update frontend dependencies

package.json

@@ -7,14 +7,13 @@
     "watch-poll": "npm run watch -- --watch-poll",
     "hot": "cross-env NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
     "prod": "npm run production",
-    "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
-    "postinstall": "opencollective-postinstall || true"
+    "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
   },
   "devDependencies": {
     "animate-sass": "^0.8.2",
     "axios": "^0.19",
-    "bootstrap-sass": "^3.4.1",
-    "chart.js": "^2.9.3",
+    "bootstrap-sass": "^3.4.3",
+    "chart.js": "^2.9.4",
     "cross-env": "^5.1",
     "es5-shim": "^4.5.14",
     "flatpickr": "^4.5.7",
@@ -24,24 +23,19 @@
     "jquery-minicolors": "^2.1.10",
     "jquery-serializeobject": "^1.0.0",
     "jquery-sparkline": "^2.4.0",
-    "laravel-mix": "^2.1",
-    "laravel-mix-purgecss": "^3.0.0",
+    "laravel-mix": "^5.0.9",
+    "laravel-mix-purgecss": "^4.2.0",
     "livestamp": "git+https://github.com/mattbradley/livestampjs.git#develop",
     "lodash": "^4.17.13",
     "messenger": "git+https://github.com/HubSpot/messenger.git",
     "moment": "^2.24.0",
     "promise": "^7.3.1",
+    "sass": "^1.69.5",
+    "sass-loader": "^8.0.2",
     "sortablejs": "^1.8.4",
     "sweetalert2": "^6.8.0",
-    "vue": "^2.6.10",
-    "vue-template-compiler": "^2.6.10"
+    "vue": "^2.7.15",
+    "vue-template-compiler": "^2.7.15"
   },
-  "private": true,
-  "dependencies": {
-    "opencollective-postinstall": "^2.0.2"
-  },
-  "collective": {
-    "type": "opencollective",
-    "url": "https://opencollective.com/Cachet"
-  }
+  "private": true
 }

webpack.mix.js

@@ -13,14 +13,10 @@ require('laravel-mix-purgecss')
  |
  */
 
-const sassOptions = {
-    includePaths: ['node_modules'],
-};
-
 mix
     .copyDirectory('node_modules/ionicons/fonts', 'public/fonts')
-    .sass('resources/assets/sass/dashboard.scss', 'public/dist/css/dashboard', sassOptions)
-    .sass('resources/assets/sass/app.scss', 'public/dist/css', sassOptions)
+    .sass('resources/assets/sass/dashboard.scss', 'public/dist/css/dashboard')
+    .sass('resources/assets/sass/app.scss', 'public/dist/css')
     .purgeCss()
     .options({
         processCssUrls: false