chore: get rid of gulp-sass/node-sass/node-gyp (#1560)

gulpfile.js

@@ -6,6 +6,7 @@ const stylelint = require('gulp-stylelint')
 const babel = require('rollup-plugin-babel')
 const json = require('rollup-plugin-json')
 const merge = require('merge2')
+const sass = require('sass')
 const browserSync = require('browser-sync').create()
 const packageJson = require('./package.json')
 const execute = require('./utils/execute')
@@ -84,8 +85,10 @@ if (typeof window !== 'undefined' && window.Sweetalert2){\
 })
 
 gulp.task('build:styles', () => {
-  return gulp.src('src/sweetalert2.scss')
-    .pipe($.sass())
+  const result = sass.renderSync({ file: 'src/sweetalert2.scss' })
+  fs.writeFileSync('dist/sweetalert2.css', result.css)
+
+  return gulp.src('dist/sweetalert2.css')
     .pipe($.autoprefixer())
     .pipe(gulp.dest('dist'))
     .pipe($.if(!skipMinification, $.cleanCss()))

package.json

@@ -29,7 +29,6 @@
     "gulp-noop": "^1.0.0",
     "gulp-rename": "^1.2.2",
     "gulp-rollup": "^2.16.2",
-    "gulp-sass": "^4.0.2",
     "gulp-stylelint": "^9.0.0",
     "gulp-tslint": "^8.1.2",
     "gulp-typescript": "^5.0.0",
@@ -52,6 +51,7 @@
     "rollup": "^1.1.2",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-json": "^4.0.0",
+    "sass": "^1.19.0",
     "sinon": "^7.2.3",
     "stylelint": "^10.0.0",
     "stylelint-config-standard": "^18.2.0",