Make scss tests work on Windows too. (#37713)

Also, add missing `'use strict'` statements; these aren't real modules.

scss/tests/jasmine.js

@@ -1,16 +1,17 @@
 /* eslint-env node */
 
+/* eslint-disable camelcase */
+
+'use strict'
+
 const path = require('node:path')
 
 module.exports = {
-  spec_dir: 'scss' /* eslint-disable-line camelcase */,
-
-  // Make Mocha look for `.test.scss` files
-  spec_files: ['**/*.{test,spec}.scss'] /* eslint-disable-line camelcase */,
-
+  spec_dir: 'scss',
+  // Make Jasmine look for `.test.scss` files
+  spec_files: ['**/*.{test,spec}.scss'],
   // Compile them into JS scripts running `sass-true`
   requires: [path.join(__dirname, 'sass-true/register')],
-
   // Ensure we use `require` so that the require.extensions works
   // as `import` completely bypasses it
   jsLoader: 'require'