support v1

index.js

@@ -54,6 +54,13 @@ Toolkit.run(async tools => {
     newVersion = execSync(`npm version --git-tag-version=false ${version}`).toString().trim()
     newVersion = `${process.env['INPUT_TAG-PREFIX']}${newVersion}`
     console.log('new version:', newVersion)
+    try {
+      // to support "actions/checkout@v1"
+      await tools.runInWorkspace('git', ['commit', '-a', '-m', `ci: ${commitMessage} ${newVersion}`])
+    } catch (e) {
+      console.warn('git commit failed because you are using "actions/checkout@v2"; ' +
+        'but that doesnt matter because you dont need that git commit, thats only for "actions/checkout@v1"')
+    }
 
     const remoteRepo = `https://${process.env.GITHUB_ACTOR}:${process.env.GITHUB_TOKEN}@github.com/${process.env.GITHUB_REPOSITORY}.git`
     // console.log(Buffer.from(remoteRepo).toString('base64'))