Bring back 3.1.x branch into Dependabot management

.github/dependabot.yml

@@ -14,22 +14,22 @@ updates:
     labels:
       - 'type: dependency-upgrade'
     groups:
-       development-dependencies:
-         update-types:
+      development-dependencies:
+        update-types:
           - patch
-         patterns: 
-         - com.gradle.*
-         - io.spring.*
-         - org.ajoberstar.grgit
-         - org.antora
-         - io.micrometer:micrometer-docs-generator
-         - com.willowtreeapps.assertk:assertk-jvm
-         - org.hibernate.validator:hibernate-validator
-         - org.apache.httpcomponents.client5:httpclient5
-         - org.awaitility:awaitility
-         - net.ltgt.errorprone
-         - com.uber.nullaway*
-         - com.google.errorprone*
+        patterns:
+          - com.gradle.*
+          - io.spring.*
+          - org.ajoberstar.grgit
+          - org.antora
+          - io.micrometer:micrometer-docs-generator
+          - com.willowtreeapps.assertk:assertk-jvm
+          - org.hibernate.validator:hibernate-validator
+          - org.apache.httpcomponents.client5:httpclient5
+          - org.awaitility:awaitility
+          - net.ltgt.errorprone
+          - com.uber.nullaway*
+          - com.google.errorprone*
 
   - package-ecosystem: github-actions
     directory: /
@@ -76,6 +76,51 @@ updates:
   - package-ecosystem: github-actions
     target-branch: 3.2.x
     directory: /
+    schedule:
+      interval: weekly
+      day: saturday
+    labels:
+      - 'type: task'
+    groups:
+      development-dependencies:
+        patterns:
+          - '*'
+
+  - package-ecosystem: gradle
+    target-branch: 3.1.x
+    directory: /
+    schedule:
+      interval: monthly
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-major
+          - version-update:semver-minor
+    open-pull-requests-limit: 10
+    labels:
+      - 'type: dependency-upgrade'
+    groups:
+      development-dependencies:
+        update-types:
+          - patch
+        patterns:
+          - com.gradle.*
+          - com.github.spotbugs
+          - io.spring.*
+          - org.ajoberstar.grgit
+          - org.antora
+          - io.micrometer:micrometer-docs-generator
+          - com.willowtreeapps.assertk:assertk-jvm
+          - org.hibernate.validator:hibernate-validator
+          - org.apache.httpcomponents.client5:httpclient5
+          - org.awaitility:awaitility
+          - org.xerial.snappy:snappy-java
+          - org.lz4:lz4-java
+          - com.github.luben:zstd-jni
+
+  - package-ecosystem: github-actions
+    target-branch: 3.1.x
+    directory: /
     schedule:
       interval: weekly
       day: saturday