testing/miniserve: upgrade to 0.18.0

https://github.com/svenstaro/miniserve/releases/tag/v0.18.0

testing/miniserve/APKBUILD

 # Contributor: Michał Polański <michal@polanski.me>
 # Maintainer: Michał Polański <michal@polanski.me>
 pkgname=miniserve
-pkgver=0.17.0
+pkgver=0.18.0
 pkgrel=0
 pkgdesc="Quickly serve files via HTTP"
 url="https://github.com/svenstaro/miniserve"
@@ -33,5 +33,5 @@ package() {
 }
 
 sha512sums="
-e9ed5bfb717ff4c3932d6c64430dadbacbd5ea6079d4c9be0558d5aef2a1863e378246f8f42a8f94e23be6092dbde757cc5f1f2a0e85793995ce8b380238d17b  miniserve-0.17.0.tar.gz
+0427171acb9303bcc0950c960ea4486178c756b17a79b0583487a5521eec96b024ac6ea6f9eb128c090dc9c12408735d40728bb75705b5b5b37f627d0860a15a  miniserve-0.18.0.tar.gz
 "