target_commitish in GitHub Releases has two different meanings:
* Target commit that a new associated tag will be created on
* Target branch to compute how many "commits to since this release"
target_commitish is usually the default branch (aka master), because the
distance between the release and the latest branch is the primary concern.
Before this change, target_commitish was left to be a hash and the
feature of GitHub Releases that shows how much time passed since the
release is ruined, because no tracking branch is given.
By this change, target_commitish is changed to be the default branch
given in the configuration (options.branch) via edit a release API after
the release and tag are created via crate a release API.
This commit removes babel/es6 from all source and test files, because it was introducing a lot of overhead and only little gain.
This commit fixes and enables integration tests on Travis.
This commit fixes#153 and #151 along the way.
_Originally this commit should have only removed babel, but without working tests that's a bit too hairy._
_I only realized that half way into removing babel/es6, so things are all over the place now._
Closes#153, Closes#151
