v0.2-alpha.2 prerelease

changes:

05d0e3e Issue-75: GetState returns gRPC NOT_FOUND (#76)
b608e9d add db auto creation env var 🎉
7c5b687 add db auto creation env var 🎉
69056b9 Fix event handler error (#73)
487a6a7 quick readme update 🎉 (#72) kudos to @gamid
56aab39 scalafmt
f3e1ecc Issue 70: move settings to subpackage (#71)
b9f15d8 fix docs for encryption
f5c3a9c Issue 51: Make event/state proto registration optional (#63)
cba819f issue #64: upgrade to lagom-pb 0.6.0
16a6848 issue #64: upgrade to lagom-pb 0.6.0 (#65) 🎉
7141eea hotfix: make propagated/persisted gRPC optional
54f5d46 fix formatting issue 🎉
a65b378 gRPC header propagation and persistence (#62)
4aa06a5 Issue #49: Add eventTag to metadata (#60)
8c52488 issue #29: fix env var naming 🚑
3f6d37b hotfix: downgrade dotenv plugin (#61)
8480691 Issue-49: lagom pb update (#56)
c2c6d7a Issue-58: Optional Encryptors for lagom-pb v0.6 (#57)