2.0.3

What's Changed

• Update README to include Service Worker config info by @rgomezp in #56
• 2.0.3 Release by @rgomezp in #59

Fixed

• Switch from a timeout strategy during OneSignal initialization to script#onload and script#onerror so that calls to #init will always resolve.

Full Changelog: 2.0.2...2.0.3