Add action to update release draft version level

.github/workflows/after-master-commit.yml

@@ -0,0 +1,40 @@
+name: After master commit
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  check-version-level-and-update:
+    if: github.repository == 'oncokb/oncokb-annotator'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: 'Update Version Level'
+        run: |
+          git pull
+          VERSION_LEVEL=$(cat .version-level | tr "[:upper:]" "[:lower:]")
+
+          RELEASE_DRAFTER_MINOR='NEXT_MINOR_VERSION'
+          RELEASE_DRAFTER_PATCH='NEXT_PATCH_VERSION'
+
+          if [[ $VERSION_LEVEL == 'minor' ]]; then
+          sed -i "s/$RELEASE_DRAFTER_PATCH/$RELEASE_DRAFTER_MINOR/gi" .github/release-drafter.yml
+          fi
+
+          if [[ $VERSION_LEVEL == 'patch' ]]; then
+          sed -i "s/$RELEASE_DRAFTER_MINOR/$RELEASE_DRAFTER_PATCH/gi" .github/release-drafter.yml
+          fi
+
+          CHANGED=$(git diff --name-only HEAD --)
+          if [ -n "$CHANGED" ]
+          then
+            git config user.name oncokb-bot
+            git config user.email dev.oncokb@gmail.com
+            git add .
+            git commit -m "Update action files to align the version level to $VERSION_LEVEL"
+            git push
+          fi

.version-level

@@ -0,0 +1 @@
+minor