main/apk-tools: upgrade to 2.0

(cherry picked from commit 4c56ed76)

main/apk-tools/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=apk-tools
-pkgver=2.0_rc7
+pkgver=2.0
 pkgrel=0
 pkgdesc="Alpine Package Keeper - package manager for alpine"
 subpackages="$pkgname-static"
@@ -40,4 +40,4 @@ static() {
 		"$subpkgdir"/sbin/apk.static
 }
 
-md5sums="8654e4e4e32ead79560890567caaea5e  apk-tools-2.0_rc7.tar.bz2"
+md5sums="dc827e62065c940bbcec1c93099a5718  apk-tools-2.0.tar.bz2"