testing/vals: upgrade to 0.20.0

testing/vals/APKBUILD

 # Maintainer: Hoang Nguyen <folliekazetani@protonmail.com>
 pkgname=vals
-pkgver=0.19.0
+pkgver=0.20.0
 pkgrel=0
 pkgdesc="Helm-like configuration values loader with support for various sources"
 url="https://github.com/variantdev/vals"
@@ -26,5 +26,5 @@ package() {
 }
 
 sha512sums="
-031f6d07a4976c0b7a1c8c225c64c7855cae92d437639322f70f6694a655ca6309e5bb7bdbe0f969a75dab3676d0355d96e9a424e233af68b3d67bf7eafb7606  vals-0.19.0.tar.gz
+25ff1b966005b7ecf6c2b861985e2262145a39aadb1904582c9d6f0db3ea3dcccf6c6c51a37f18a7b94f9490a6e3056d33d269d2f349e1011fb0fb47dc1c0f8d  vals-0.20.0.tar.gz
 "