feat: switch from libsass to dart-sass

Because dart-sass is now the reference implementation of sass.

lib/dependencies.json

@@ -51,7 +51,7 @@
   "gulp-postcss": "^8.0.0",
   "gulp-protractor": "^4.1.1",
   "gulp-rename": "^2.0.0",
-  "gulp-sass": "^4.0.2",
+  "gulp-dart-sass": "^1.0.0",
   "gulp-sourcemaps": "^2.6.5",
   "gulp-stylus": "^2.7.0",
   "gulp-tslint": "^8.1.4",
@@ -80,13 +80,13 @@
   "less": "^3.11.1",
   "less-loader": "^5.0.0",
   "minimatch": "^3.0.4",
-  "node-sass": "^4.13.1",
   "postcss-loader": "^3.0.0",
   "postcss-url": "^8.0.0",
   "promise-polyfill": "^8.1.3",
   "protractor": "^5.4.3",
   "regenerator-runtime": "^0.13.3",
   "requirejs": "^2.3.6",
+  "sass": "^1.26.3",
   "sass-loader": "^8.0.2",
   "style-loader": "^1.1.3",
   "stylus": "^0.54.7",

skeleton/cli-bundler/aurelia_project/tasks/process-css.ext

@@ -10,7 +10,7 @@ import notify from 'gulp-notify';
 import less from 'gulp-less';
 // @endif
 // @if feat.sass
-import sass from 'gulp-sass';
+import sass from 'gulp-dart-sass';
 // @endif
 // @if feat.stylus
 import stylus from 'gulp-stylus';
@@ -35,7 +35,7 @@ import * as notify from 'gulp-notify';
 import * as less from 'gulp-less';
 // @endif
 // @if feat.sass
-import * as sass from 'gulp-sass';
+import * as sass from 'gulp-dart-sass';
 // @endif
 // @if feat.stylus
 import * as stylus from 'gulp-stylus';
@@ -59,7 +59,7 @@ export default function processCSS() {
     .pipe(less())
     // @endif
     // @if feat.sass
-    .pipe(sass().on('error', sass.logError))
+    .pipe(sass.sync().on('error', sass.logError))
     // @endif
     // @if feat.stylus
     .pipe(stylus())
@@ -90,7 +90,7 @@ export function pluginCSS(dest) {
       .pipe(less())
       // @endif
       // @if feat.sass
-      .pipe(sass().on('error', sass.logError))
+      .pipe(sass.sync().on('error', sass.logError))
       // @endif
       // @if feat.stylus
       .pipe(stylus())

skeleton/cli-bundler/package.json

@@ -48,7 +48,7 @@
     // @endif
 
     // @if feat.sass
-    "gulp-sass": "",
+    "gulp-dart-sass": "",
     // @endif
 
     // @if feat.stylus

skeleton/webpack/package.json

@@ -41,7 +41,7 @@
 
     // @if feat.sass
     "sass-loader": "",
-    "node-sass": "",
+    "sass": "",
     // @endif
 
     // @if feat.stylus