Change karma tests to run sequential.

I was getting port in use errors.

package.json

@@ -44,7 +44,7 @@
     "js-minify-standalone": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.js.map,includeSources,url=bootstrap.min.js.map\" --output dist/js/bootstrap.min.js dist/js/bootstrap.js",
     "js-minify-bundle": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.bundle.js.map,includeSources,url=bootstrap.bundle.min.js.map\" --output dist/js/bootstrap.bundle.min.js dist/js/bootstrap.bundle.js",
     "js-minify-docs": "uglifyjs --mangle --comments \"/^!/\" --output assets/js/docs.min.js assets/js/vendor/anchor.min.js assets/js/vendor/clipboard.min.js assets/js/vendor/holder.min.js \"assets/js/src/*.js\"",
-    "js-test": "npm-run-all --parallel js-test-karma*",
+    "js-test": "npm-run-all js-test-karma*",
     "js-test-karma": "karma start js/tests/karma.conf.js",
     "js-test-karma-old": "cross-env USE_OLD_JQUERY=true npm run js-test-karma",
     "js-test-karma-bundle": "cross-env karma start js/tests/karma-bundle.conf.js",