main/libpng: new upstream version 1.6.20

main/libpng/APKBUILD

 # Contributor: Carlo Landmeter <clandmeter@gmail.com>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=libpng
-pkgver=1.6.19
+pkgver=1.6.20
 _apngver=$pkgver
 pkgrel=0
 pkgdesc="Portable Network Graphics library"
@@ -38,9 +38,9 @@ package() {
 	install -Dm644 LICENSE "${pkgdir}"/usr/share/licenses/${pkgname}/LICENSE || return 1
 }
 
-md5sums="3121bdc77c365a87e054b9f859f421fe  libpng-1.6.19.tar.gz
-b215830867151242fb4ef9d246f050c4  libpng-1.6.19-apng.patch.gz"
-sha256sums="9f977ac8e4e3d4d5b001b32243f111eeec21bb6b59e583f2fb41fd2e48840352  libpng-1.6.19.tar.gz
-304ba384fa147cccc11c73d165d4e8828ad7e3e45fe02ff907147a13989af82d  libpng-1.6.19-apng.patch.gz"
-sha512sums="65df82b87646dfb855caaa84706b55b4c6c51dc33ce0e4476537737013a7f7a329a8f78c170c3e6354c92b7d6f55341d3fd6054e2e636e67c7829c38b10f6516  libpng-1.6.19.tar.gz
-4a731fc291e6954d4dd1a594477eff7ed65f27ac07061b06b8ad50f31db0f9ff201a0173cc9551b1a04290f8c86f77318517e3eeec142eb8bc65368987bf635f  libpng-1.6.19-apng.patch.gz"
+md5sums="53166795d924950988a5513d3e605333  libpng-1.6.20.tar.gz
+b2186d5e7853890e25b34b03c7f2ddde  libpng-1.6.20-apng.patch.gz"
+sha256sums="3d3bdc16f973a62fb1d26464fe2fe19f51dde9b883feff3e059d18ec1457b199  libpng-1.6.20.tar.gz
+e63b7ebb68a520ec6fb8a4f0af7fe4a878e14a79fd8cc55ec3d599891355af87  libpng-1.6.20-apng.patch.gz"
+sha512sums="6fb3e556f384b3ba380c9f231881c277013307608a7b9e070e27e46d41ddae2c949761850c9b1b36c64f0297de435fc5eaf0c3724146fafd1ab6aa930d0b8f51  libpng-1.6.20.tar.gz
+364fb5420c799b17ac4cc0e06b508062eefdb389dfee942efbafc2a603a58c4f9c13cb3cb437858be595d74c309c23e0934f15e5fc867df44de903286363379d  libpng-1.6.20-apng.patch.gz"