feat: add support for strip a prefix from the tag (#249)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

action.yml

@@ -57,6 +57,7 @@ runs:
         INPUT_PATHS: ${{ inputs.paths }}
         INPUT_PATTERN: ${{ inputs.pattern }}
         INPUT_ONLY_MAJOR: ${{ inputs.only_major }}
+        INPUT_STRIP_PREFIX: ${{ inputs.strip_prefix }}
 
 branding:
   icon: arrow-up

entrypoint.sh

@@ -17,6 +17,11 @@ if [[ -z "$CURRENT_TAG" ]]; then
   CURRENT_TAG=$(git tag --sort=-v:refname | grep -vE "^v[0-9]+$" | head -n 2 | tail -n 1) && exit_status=$? || exit_status=$?
 fi
 
+if [[ -n "$INPUT_STRIP_PREFIX" ]]; then
+  CURRENT_TAG=${CURRENT_TAG#"$INPUT_STRIP_PREFIX"}
+  NEW_TAG=${NEW_TAG#"$INPUT_STRIP_PREFIX"}
+fi
+
 if [[ $exit_status -ne 0 ]]; then
   echo "::warning::Initial release detected no updates would be made to specified files."
   echo "::warning::Setting new_version and old_version to $NEW_TAG."