add TagBot and CompatHelper

github/workflows/CompatHelper.yml

@@ -0,0 +1,26 @@
+name: CompatHelper
+
+on:
+  schedule:
+    - cron: '0 0 * * 0'
+  issues:
+    types: [opened, reopened]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        julia-version: [1.2.0]
+        julia-arch: [x86]
+        os: [ubuntu-latest]
+    steps:
+      - uses: julia-actions/setup-julia@latest
+        with:
+          version: ${{ matrix.julia-version }}
+      - name: Pkg.add("CompatHelper")
+        run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
+      - name: CompatHelper.main()
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: julia -e 'using CompatHelper; CompatHelper.main()'

github/workflows/TagBot.yml

@@ -0,0 +1,12 @@
+name: TagBot
+on:
+  schedule:
+    - cron: 0 0 * * 0
+jobs:
+  TagBot:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: JuliaRegistries/TagBot@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}