// Sass
gulp.task('sass', function() {
  gulp.src('./assets/scss/**/**/*.scss')
    .pipe(sass().on('error', function (err) {
      sass.logError(err);
      this.emit('end');
    }))
    .pipe(autoprefixer('last 2 versions'))
    .pipe(rename('theme.scss.liquid'))
    .pipe(replace('"{{', '{{'))
    .pipe(replace('}}"', '}}'))
    .pipe(gulp.dest('./assets/'));
});

gulp.task('watch', function() {
  gulp.watch('./assets/scss/**/**/*.scss', gulp.series('sass'));
});

[12:55:33] Starting 'watch'...
[12:55:37] Starting 'sass'...