user/checkbashisms: Update to 2.20.4

user/checkbashisms/APKBUILD

 # Contributor: Natanael Copa <ncopa@alpinelinux.org>
 # Maintainer: Max Rees <maxcrees@me.com>
 pkgname=checkbashisms
-pkgver=2.20.3
+pkgver=2.20.4
 pkgrel=0
 pkgdesc="Check shell scripts for POSIX compliance"
 url="https://salsa.debian.org/debian/devscripts"
@@ -37,4 +37,4 @@ bashcomp() {
 		"$subpkgdir/usr/share/bash-completion/completions/$pkgname"
 }
 
-sha512sums="6d86deeecff82fc16df7d978678f5b88293164688078bf0732a7e6b844cf8845868be31c107518cf43b8dbcbadcd12a9691585f5725abd397f63ff9456fbdd8f  devscripts_2.20.3.tar.xz"
+sha512sums="49e9ae38ca3682f399a17f2108a7ee15198dc955d8c7c4c1b043456c19cb35b47b6116de9a2cfaccbdd7560e79426ca0953674e5a89ac226d21af2c1cf847e5c  devscripts_2.20.4.tar.xz"