Create update-submodules gha

.github/workflows/update-submodules.yml

@@ -0,0 +1,42 @@
+name: Dependencies update on new version
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  submodule_update:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          ref: master
+          submodules: true
+          token: ${{ secrets.PAT }}
+
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '14.x'
+
+      - name: Find version difference
+        run: |
+          cd ./packages/eth-sdk
+          yarn upgrade typechain @typechain/ethers-v5 --latest
+          yarn
+
+      - uses: peter-evans/create-pull-request@v3
+        with:
+          base: master
+          branch: bump-typechain
+          title: Bump typechain
+          body: |
+            - Dependency updates
+
+            A new typechain or @typechain/ethers-v5 version released
+            Auto-generated by [create-pull-request][1]
+
+            [1]: https://github.com/peter-evans/create-pull-request
+          reviewers: krzkaczor
+          token: ${{ secrets.PAT }}