build: group dependabot dependencies

Author: jknack

.github/dependabot.yml

@@ -3,36 +3,9 @@ updates:
 - package-ecosystem: maven
   directory: "/"
   schedule:
-    interval: daily
-    time: "09:00"
-  open-pull-requests-limit: 10
-  ignore:
-  - dependency-name: org.springframework:spring-test
-    versions:
-    - ">= 5.a, < 6"
-  - dependency-name: com.google.javascript:closure-compiler
-    versions:
-    - v20210106
-    - v20210202
-    - v20210302
-  - dependency-name: org.eclipse.jetty:jetty-servlet
-    versions:
-    - 11.0.0
-    - 11.0.1
-  - dependency-name: org.eclipse.jetty:jetty-webapp
-    versions:
-    - 11.0.0
-    - 11.0.1
-  - dependency-name: org.eclipse.jetty:jetty-server
-    versions:
-    - 11.0.0
-    - 11.0.1
-  - dependency-name: org.yaml:snakeyaml
-    versions:
-    - "1.27"
-  - dependency-name: org.apache.commons:commons-lang3
-    versions:
-    - "3.11"
-  - dependency-name: org.apache.felix:maven-bundle-plugin
-    versions:
-    - 5.1.1
+    interval: weekly
+  open-pull-requests-limit: 1
+  groups:
+    dependencies:
+      patterns:
+      - "*"