Update devel/packr form v2.2.0 to v2.4.0
Changelogs: https://github.com/gobuffalo/packr/releases/tag/v2.4.0
https://github.com/gobuffalo/packr/releases/tag/v2.3.2 https://github.com/gobuffalo/packr/releases/tag/v2.3.1 https://github.com/gobuffalo/packr/releases/tag/v2.3.0 https://github.com/gobuffalo/packr/releases/tag/v2.2.1
PR: 238321
Submitted by: Dmitri Goutnik <dg@syrec.org> (maintainer)