upgpkg: devscripts 2.23.1-3

- Fix PKGBUILD typos in conflicts and provides
- Ensure working build in systems where the package is already installed

.SRCINFO

@@ -1,7 +1,7 @@
 pkgbase = devscripts
 	pkgdesc = Scripts to make the life of a Debian Package maintainer easier
 	pkgver = 2.23.1
-	pkgrel = 2
+	pkgrel = 3
 	url = https://tracker.debian.org/pkg/devscripts
 	arch = i686
 	arch = x86_64
@@ -35,7 +35,8 @@ pkgbase = devscripts
 	optdepends = perl-moo: Required for uscan
 	optdepends = perl-ipc-run: Required for uscan
 	optdepends = perl-lwp-protocol-https: Required for uscan
-	provides = checkbashism
+	provides = checkbashisms
+	conflicts = checkbashisms
 	options = !makeflags
 	source = https://deb.debian.org/debian/pool/main/d/devscripts/devscripts_2.23.1.tar.xz
 	source = fixes.patch