replaced gulp-sass with gulp-dart-sass

removed node-sass as explicit dev dependency
gulp-dart-sass will already require sass (new dart sass, not node-sass)

added fibers as a new dev dependency
this is a requirement to speed up async sass compiling
https://sass-lang.com/dart-sass

full sub-dependencies upgrade (deleted yarn.lock then did yarn install)

bumped v1 version string to trigger auto rebuild

gulpfile.js

@@ -2,6 +2,7 @@ const { exec } = require('child_process')
 const gulp = require('gulp')
 const cssnano = require('cssnano')
 const del = require('del')
+const Fiber = require('fibers')
 const buble = require('gulp-buble')
 const eslint = require('gulp-eslint7')
 const gulpif = require('gulp-if')
@@ -9,8 +10,8 @@ const nodemon = require('gulp-nodemon')
 const postcss = require('gulp-postcss')
 const postcssPresetEnv = require('postcss-preset-env')
 const replace = require('gulp-replace')
-const sass = require('gulp-sass')
-const sassCompiler = require('node-sass')
+const sass = require('gulp-dart-sass')
+const sassCompiler = require('sass')
 const sourcemaps = require('gulp-sourcemaps')
 const stylelint = require('gulp-stylelint')
 const terser = require('gulp-terser')
@@ -105,7 +106,7 @@ gulp.task('build:sass', function () {
     ignore: '_*.scss'
   })
     .pipe(sourcemaps.init())
-    .pipe(sass().on('error', sass.logError))
+    .pipe(sass({ fiber: Fiber }).on('error', sass.logError))
     .pipe(postcss(postcssPlugins))
     .pipe(sourcemaps.write('.'))
     .pipe(gulp.dest(dist))

package.json

@@ -65,19 +65,19 @@
     "eslint-plugin-import": "~2.22.1",
     "eslint-plugin-node": "~11.1.0",
     "eslint-plugin-promise": "~4.2.1",
+    "fibers": "~5.0.0",
     "gulp": "~4.0.2",
     "gulp-buble": "~0.9.0",
     "gulp-cli": "~2.3.0",
+    "gulp-dart-sass": "^1.0.2",
     "gulp-eslint7": "~0.3.0",
     "gulp-if": "~3.0.0",
     "gulp-nodemon": "~2.5.0",
     "gulp-postcss": "~9.0.0",
     "gulp-replace": "~1.0.0",
-    "gulp-sass": "~4.1.0",
     "gulp-sourcemaps": "~3.0.0",
     "gulp-stylelint": "~13.0.0",
     "gulp-terser": "~2.0.0",
-    "node-sass": "~4.14.1",
     "postcss": "~8.1.7",
     "postcss-preset-env": "~6.7.0",
     "stylelint": "~13.8.0",

src/versions.json

@@ -1,5 +1,5 @@
 {
-  "1": "1605172204",
+  "1": "1605172205",
   "2": "1602515119",
   "3": "1602515119",
   "4": "1602515119",