chore: update semver validation script (#66)

scripts/semver.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 VERSION="${1}"
-rx='^([0-9]+\.){2}(\*|[0-9]+)$'
+rx='^([0-9]+\.){2}((\*|[0-9]+)|([0-9]+-rc\.[0-9]+))$'
 if [[ $VERSION =~ $rx ]]; then
  exit 0
 else