Use node.js for browser-based CI

grunt/config/sass.js

@@ -0,0 +1,14 @@
+const sass = require('node-sass');
+
+module.exports = {
+  options: {
+    implementation: sass,
+    outputStyle: 'compact',
+    sourceComments: false
+  },
+  dist: {
+    files: {
+      "lib/jasmine-core/jasmine.css": "src/html/jasmine.scss"
+    }
+  }
+};