Lastversion

Fixed
* `--format json` and `--format assets` work for Non-GitHub projects

Added
* `lastversion repo:branch` syntax, e.g. `lastversion php:7.2` or `lastversion nginx:mainline`
Fixed
* require feedparser version that works with Python 2

Added
* New switch `--only` allows filtering projects in repos with multiple actual projects
* Ability to sniff version from a software website which publishes releases in RSS/ATOM feeds 23
* Ability to sniff version by discovering GitHub repository links on a software website 23
Fixed
* No longer messing with root logger, playing safe as a library (opt-in behavior when used as
module)

Added
* Fixed up `--major` constraint to work more correctly
* Use GraphQL API (GitHub) when deep searching tags is required (faster `--major`)
* Paginate across tags when a release matching constraints is not present in the feed (GitHub) 12
* Simple Python interface for update checks: `lastversion.has_update(repo, current_version)`
* Various fixes

Added
* Aggregate older tags, up to one year, for better latest release detection (feed only)

Added
* General improvements for releases detection
* SourceForge projects support