pub fn parse_header(changelog: &str) -> Option<String>Expand description
Parse the header from a changelog. The changelog header is a string at the begin of the changelog that:
- Starts with
# Changelog,# CHANGELOG, or# changelog - ends with
## Unreleased,## [Unreleased]or## ..anything..(in the ..anything.. case,## ..anything..is not included in the header)