add tagging workflow

Author: apexskier

.github/workflows/tag.yml

@@ -0,0 +1,31 @@
+name: Tag creation
+
+on:
+  push:
+	tags:
+	  - v*
+
+jobs:
+  release:
+	runs-on: ubuntu-latest
+
+	steps:
+	  - name: Get the version
+		id: version
+		run: echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}
+		shell: bash
+
+	  - uses: apexskier/github-semver-parse@v1
+		id: semver
+		with:
+		  version: ${{ steps.version.outputs.VERSION }}
+
+	  - name: Release
+		if: ${{ steps.semver.outputs.version }}
+		uses: actions/create-release@v1
+		env:
+		  GITHUB_TOKEN: ${{ secrets.RELEASE_GH_TOKEN }}
+		with:
+		  tag_name: ${{ steps.version.outputs.VERSION }}
+		  release_name: ${{ steps.version.outputs.VERSION }}
+		  prerelease: ${{ !!steps.semver.outputs.prerelease }}