user/zstd: bump to 1.4.0

user/zstd/APKBUILD

 # Contributor: A. Wilcox <awilfox@adelielinux.org>
 # Maintainer: A. Wilcox <awilfox@adelielinux.org>
 pkgname=zstd
-pkgver=1.3.8
+pkgver=1.4.0
 pkgrel=0
 pkgdesc="Fast real-time compression algorithm"
 url="https://facebook.github.io/zstd/"
@@ -24,4 +24,4 @@ package() {
 	make PREFIX="/usr" DESTDIR="$pkgdir" install
 }
 
-sha512sums="5c1c0a7a998b814a9edc1466f6d321b0d8ffcf927295fd5499137c9075a8823be03d98f61ea5212d1969f8d52b32e940b1cc10d1507d7702424ea2eea0e79a1b  zstd-1.3.8.tar.gz"
+sha512sums="ef6d95639593fed3cfb9ff4f1527c4ba38658e42f16eb3369b2a4bbe150905751bb71c6e3fe9c8bbdfceee26a540ae3e41bd0f0bc692d36db444b7da65a6e304  zstd-1.4.0.tar.gz"