Make release increment optional

Author: marcbouchenoire

.github/workflows/release.yml

@@ -4,6 +4,8 @@ on:
     inputs:
       increment:
         description: "Release increment (e.g. patch, minor, major)"
+        required: false
+        default: ""
         type: choice
         options:
           - patch
@@ -35,7 +37,7 @@ jobs:
       - name: Release package
         run: |
           ARGS=""
-          if [[ -n "${{ github.event.inputs.increment }}" ]]; then
+          if [[ "${{ github.event.inputs.increment }}" != "" ]]; then
             ARGS+="${{ github.event.inputs.increment }}"
           fi
           if [[ -n "${{ github.event.inputs.prerelease }}" ]]; then