main/apk-tools: upgrade to 2.2.0

main/apk-tools/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=apk-tools
-pkgver=2.2.0_rc1
+pkgver=2.2.0
 pkgrel=0
 pkgdesc="Alpine Package Keeper - package manager for alpine"
 subpackages="$pkgname-static lua-apk:luaapk"
@@ -54,4 +54,4 @@ luaapk() {
 	mv "$pkgdir"/usr/lib "$subpkgdir"/usr/lib/
 }
 
-md5sums="a2829e24a18537ecdcb4740395142e95  apk-tools-2.2.0_rc1.tar.bz2"
+md5sums="e4e17a96c024a2598320a7e9b912c8f2  apk-tools-2.2.0.tar.bz2"