Fix mocha test

Author: jordangarcia

packages/optimizely-sdk/package.json

@@ -6,7 +6,7 @@
   "browser": "lib/index.browser.js",
   "typings": "lib/index.d.ts",
   "scripts": {
-    "test": "mocha ./lib/*.tests.js ./lib/**/*.tests.js ./lib/**/**/*tests.js --recursive",
+    "test": "mocha ./lib/*.tests.js ./lib/**/*.tests.js ./lib/**/**/*tests.js --recursive --exit",
     "test-xbrowser": "karma start karma.bs.conf.js --single-run",
     "test-umdbrowser": "npm run build-browser-umd && karma start karma.umd.conf.js --single-run",
     "build-browser-umd": "rm -rf dist && webpack",