RC-2.7.1 (kickstarter#963)

* - Update version because of this crash with the release 2.7.0
Caused by java.lang.IllegalStateException
java.lang.InterruptedException
com.google.firebase.iid.FirebaseInstanceId.zzl (com.google.firebase:firebase-iid@@20.1.7:84)

* - updated versions

NT-658 Errored pledge deserialization (kickstarter#867)

Populating PushNotificationEnvelope with value of "errored_pledge" if it's in the data blob

Bumping version codes post new 2.6.0 RC creation with NT-1193 bug fix.

version 2.5.0

Tagging 2.3.0

2.2.0 release

2.1.3

Tagging 2.1.1 release.

Tagging 2.0.0 release