Setup TagBot (#4)

Author: tkf

.github/workflows/TagBot.yml

@@ -0,0 +1,20 @@
+name: TagBot
+on:
+  issue_comment:
+    types:
+      - created
+  push:
+    branches:
+      - actions/trigger/TagBot
+  workflow_dispatch:
+jobs:
+  TagBot:
+    if: >-
+      github.event_name == 'workflow_dispatch' ||
+      github.event_name == 'push' ||
+      github.actor == 'JuliaTagBot'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: JuliaRegistries/TagBot@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}