release v3.2.1

official release of v3.2.1 (airbnb#1236)

* bumping version to 3.2.1

* add two lambda layers to improve deploy time (airbnb#1235)

* adding support for lambda layers for precompiled dependencies

* update to necessary lambdas to use lambda layers (apps)

* removing logic for precompiled packages

* trying not to suck

release v3.2.0

release v3.1.2

release v3.1.1

release v3.1.0

release v3.0.0

release v2.3.0

release v2.2.1

release 2.2.0