Add dependabot

Author: ryanjbaxter

.github/dependabot.yaml

@@ -0,0 +1,55 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+
+updates:
+    - package-ecosystem: "github-actions"
+      directory: "/"
+      target-branch: "main"
+      schedule:
+          interval: "weekly"
+    - package-ecosystem: "github-actions"
+      directory: "/"
+      target-branch: "3.3.x"
+      schedule:
+          interval: "weekly"
+    - package-ecosystem: maven
+      directory: /
+      schedule:
+          interval: daily
+      target-branch: main
+      ignore:
+          # only upgrade by minor or patch
+          - dependency-name: "*"
+            update-types:
+                - version-update:semver-major
+                - version-update:semver-minor
+    - package-ecosystem: maven
+      directory: /
+      schedule:
+          interval: daily
+      target-branch: 3.3.x
+      ignore:
+          # only upgrade by minor or patch
+          - dependency-name: "*"
+            update-types:
+                - version-update:semver-major
+                - version-update:semver-minor
+    - package-ecosystem: npm
+      target-branch: docs-build
+      directory: /
+      schedule:
+          interval: weekly
+    - package-ecosystem: npm
+      target-branch: main
+      directory: /docs
+      schedule:
+          interval: weekly
+    - package-ecosystem: npm
+      target-branch: 3.3.x
+      directory: /docs
+      schedule:
+          interval: weekly