Update js-sdk-datafile-manager dependency to v0.3.0

Author: Matt Carroll

packages/optimizely-sdk/package-lock.json

@@ -32,7 +32,7 @@
   },
   "homepage": "https://github.com/optimizely/javascript-sdk/tree/master/packages/optimizely-sdk",
   "dependencies": {
-    "@optimizely/js-sdk-datafile-manager": "^0.2.0",
+    "@optimizely/js-sdk-datafile-manager": "^0.3.0",
     "@optimizely/js-sdk-event-processor": "^0.2.0",
     "@optimizely/js-sdk-logging": "^0.1.0",
     "@optimizely/js-sdk-utils": "^0.1.0",