Set requirement for cordova-android engine (#219)
Set requirement for cordova-android engine (#219)

Version 0.8.3 of the email composer plugin [uses a constructor](https://github.com/katzer/cordova-plugin-email-composer/blob/master/src/android/EmailComposer.java#L121) for the class PluginResult which was introduced in Cordova-android 3.7.0 with [this commit](https://github.com/Icenium/cordova-android/commit/fbeb379f1b2102d9d0739f92340c932bdc47873b)
katzer/cordova-plugin-email-composer,katzer/cordova-plugin-email-composer