Removed remaining use of Grunt

scripts/runSpecsInParallel.js

@@ -0,0 +1,28 @@
+const ParallelRunner = require('jasmine/parallel');
+const jasmineCore = require('../lib/jasmine-core.js');
+let numWorkers = require('os').cpus().length;
+
+if (process.env['CIRCLECI']) {
+  // On Circle CI, the above gives the number of CPU cores on the host
+  // computer, which is unrelated to the resources actually available
+  // to the container. 2 workers gives peak performance with our current
+  // configuration, but 4 might increase the odds of discovering any
+  // parallel-specific bugs.
+  numWorkers = 4;
+}
+
+const runner = new ParallelRunner({jasmineCore, numWorkers});
+
+runner.loadConfigFile('./spec/support/jasmine.json')
+  .then(() => {
+    runner.exitOnCompletion = false;
+    return runner.execute();
+  })
+  .then(
+    jasmineDoneInfo => jasmineDoneInfo.overallStatus === 'passed',
+    err => {
+      console.error(err);
+      return false;
+    }
+  )
+  .then(ok => process.exit(ok ? 0 : 1));