Enable Dependabot updates to Poetry lockfile (#125)

.github/dependabot.yml

@@ -14,3 +14,12 @@ updates:
     schedule:
       # Check for updates to GitHub Actions every week
       interval: "weekly"
+
+  # Perform checks and updates for python poetry environment.
+  # See here for more information:
+  # https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#pip-and-pip-compile
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      # Check for updates to poetry lockfile every week
+      interval: "weekly"