Enable auto-merge support

Add auto-merge support to ghb pr

This allows use of --merge or --merge-squash. Ideally you would almost
always use --merge-squash which pulls the commit title / description as
the final squashed commit message, but sometimes you may prefer --merge,
which uses a rebase instead, in the case that you want to maintain
original commit authorship, like in the case of a cherry pick.

Improve close-prs command

1. Close in parallel, very useful for huge numbers of PRs at once
2. Allow closing by branch, or age, or both

Add `delete-branches` command

1.9.2

Bump version

1.9.0

• Fix new main branch handling
• Add support for core.commentChar
• Read EDITOR for file to open
• Fix error handling when submitting PRs with invalid args

Add support for `main` branch with `ghb pr`

Previously it would default to master if no branch was passed. Now it first checks for main and prefers that.

1.6.0

Add greenify command

Update requests

CVE-2018-18074

Migrate to single python entrypoint

This makes the homebrew installation immune to external python environment changes

Convert to python3

Python 3 support (#8)

Convert to python3

Add assignme command

This adds a simple command to self assign the authed user to a PR