testing/nats-server: upgrade to 2.9.0

testing/nats-server/APKBUILD

 # Contributor: Henrik Riomar <henrik.riomar@gmail.com>
 # Maintainer: Henrik Riomar <henrik.riomar@gmail.com>
 pkgname=nats-server
-pkgver=2.8.4
-pkgrel=3
+pkgver=2.9.0
+pkgrel=0
 pkgdesc="High-Performance server for NATS.io"
 url="https://github.com/nats-io/nats-server"
 arch="all !x86 !armv7 !armhf !s390x !ppc64le" # limited by failing check()
@@ -29,5 +29,5 @@ package() {
 }
 
 sha512sums="
-6c93a83a7fb4411d4788e65c53c7250e5df3adf0d14cbebe858503d8cfaafd748f2497055f19746f37113be7a5c9fceb2d2239e2243b444900dd337ba2ad15fa  nats-server-2.8.4.tar.gz
+ce73e4efad063628799b369f4b5a6d463399c8b7cd22229ecd1eaa0ea92eed73d1c535100533f88536175a31a9efe407385af3fb56b4b048829da5896d874925  nats-server-2.9.0.tar.gz
 "