Bump version to 2021.04.06

Bump version to 2021.03.30

developer: Bump version to 2020.10.05

Bump version to 2020.10.04

lib: Fix issue when pagers read an empty argument as a file

developer: Add release message generation to release.sh

developer: Add release message generation to release.sh

Fix regression where `--color` would no longer work by itself

Fix incorrect width being passed to 'bat' in batgrep with pager