chore(ci): group Dependabot updates

Author: erikian

.github/dependabot.yml

@@ -4,3 +4,19 @@ updates:
   directory: "/"
   schedule:
     interval: "monthly"
+
+    groups:
+      # Creates a separate PR for each non-security-related major update.
+      major-version-updates:
+        applies-to: "version-updates"
+        group-by: "dependency-name"
+        update-types: ["major"]
+
+      # Creates a single PR with all non-security-related minor/patch updates.
+      non-major-version-updates:
+        applies-to: "version-updates"
+        update-types: ["minor", "patch"]
+
+      # Creates a single PR with all security-related updates.
+      security-updates:
+        applies-to: "security-updates"