Automatic NBC bump PRs (#304)

* auto PR wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wrapping up

* fork actions repos and use them

.github/workflows/nbc.yml

@@ -0,0 +1,48 @@
+name: NBC Bump PR
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  bumpNBC:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: status-im/github-app-token@v1
+        name: Generate token
+        id: generate-token
+        with:
+          app_id: ${{ secrets.BUMP_BOT_APP_ID }}
+          private_key: ${{ secrets.BUMP_BOT_APP_PRIVATE_KEY }}
+        
+      - name: Clone NBC
+        uses: actions/checkout@v2
+        with:
+          repository: status-im/nim-beacon-chain
+          ref: devel
+          path: nbc
+          submodules: true
+          fetch-depth: 0
+      
+      - name: Checkout this ref
+        run: |
+          cd nbc/vendor/nim-libp2p
+          git checkout $GITHUB_SHA
+
+      - name: Commit this bump
+        run: |
+          cd nbc
+          git config --global user.email "${{ github.actor }}@users.noreply.github.com"
+          git config --global user.name = "${{ github.actor }}"
+          git commit -a -m "auto-bump nim-libp2p"
+      
+      - name: Make PR
+        uses: status-im/create-pull-request@v3
+        with:
+          branch: nim-libp2p-auto-bump
+          path: nbc
+          token: ${{ steps.generate-token.outputs.token }}
+          title: nim-libp2p auto bump
+
+