Add defensive check for window.optimizely.data in getOptimizelyStateContexts (close #555)
Add defensive check for window.optimizely.data in getOptimizelyStateContexts (close #555)

snowplow/snowplow-javascript-tracker,snowplow/snowplow-javascript-tracker,snowplow/snowplow-javascript-tracker,snowplow/snowplow-javascript-tracker