Updates version tuple for release

Updates tuple for v1.5.0 release

Updates library version

Maintenance bump to v1.4.3

Bumps maintenance version

Minor Version bump

Minor version bump

From 1.3.1 to 1.4.0

Maintenance Version Bump

from 1.3.0 to 1.3.1

Minor version bump

From 1.2.2 to 1.3.0

Maintenance version bump

From 1.2.1 to 1.2.2

Maintenance version bump

Minor version bump.

Given the recently merged pull requests (zapier#16, zapier#17, zapier#18). A minor version bump will be issued.