chore(ci): group Dependabot updates

Author: erikian

.github/dependabot.yml

@@ -4,3 +4,18 @@ 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"