Bump version

Bumps version to 1.17.0-alpha.6

Bumps to 1.17.0-alpha.5

Bump to 1.17.0-alpha.3

Bumps to 1.17.0-alpha.2

Bump podspec to 1.17.0-alpha.1

Bump version to 1.16.1-alpha.1

Carthage support for ParseUI (parse-community#1231)

* Adds dynamic framework for ParseUI

* Proper shared schemes, fixes build for Carthage TwitterUtils, ParseUI

* Restore shared schemes

* Remove unnecessary jobs

⚡ Release 1.15.4 (parse-community#1185)

* Bumps Bolts to 1.9
* Runs latest Xcode verison (9.2) on CI
* Uses nlutsenko's xctoolchain

⚡ Release 1.15.3