Dependabot: Group version updates

Author: srittau

.github/dependabot.yml

@@ -1,8 +1,13 @@
 version: 2
 updates:
-- package-ecosystem: pip
-  directory: "/"
-  schedule:
-    interval: daily
-    time: '04:00'
-  open-pull-requests-limit: 10
+  - package-ecosystem: pip
+    directory: "/"
+    schedule:
+      interval: weekly
+      time: '04:00'
+    versioning-strategy: lockfile-only
+    groups:
+      dependencies:
+        update-types:
+          - "minor"
+          - "patch"