Support qualifiers in version strings

This is so we can release a beta.

Author: horgh

dev-bin/release.sh

@@ -5,7 +5,7 @@ set -eu -o pipefail
 changelog=$(cat CHANGELOG.md)
 
 regex='
-([0-9]+\.[0-9]+\.[0-9]+) \(([0-9]{4}-[0-9]{2}-[0-9]{2})\)
+([0-9]+\.[0-9]+\.[0-9]+[a-zA-Z0-9\-]*) \(([0-9]{4}-[0-9]{2}-[0-9]{2})\)
 -*
 
 ((.|