add dependabot also for pip packages (#751)

.github/dependabot.yml

@@ -9,10 +9,29 @@ updates:
     schedule:
       interval: "monthly"
     # Labels on pull requests for version updates only
-    labels:
-      - "ci"
+    labels: ["ci"]
     pull-request-branch-name:
       # Separate sections of the branch name with a hyphen for example, `dependabot-npm_and_yarn-next_js-acorn-6.4.1`
       separator: "-"
     # Allow up to 5 open pull requests for GitHub Actions
     open-pull-requests-limit: 5
+    reviewers:
+      - "borda"
+
+  # Enable version updates for python
+  - package-ecosystem: "pip"
+    # Look for a `requirements` in the `root` directory
+    directory: "/requirements"
+    # Check for updates once a week
+    schedule:
+      interval: "weekly"
+    # Labels on pull requests for version updates only
+    labels: ["enhancement"]
+    pull-request-branch-name:
+      # Separate sections of the branch name with a hyphen
+      # for example, `dependabot-npm_and_yarn-next_js-acorn-6.4.1`
+      separator: "-"
+    # Allow up to 5 open pull requests for pip dependencies
+    open-pull-requests-limit: 5
+    reviewers:
+      - "willingc"