Upgrade to GitHub-native Dependabot

.dependabot/config.yml

@@ -1,7 +0,0 @@
-# See https://dependabot.com/docs/config-file/
-version: 1
-update_configs:
-  - package_manager: "javascript"
-    directory: "/"
-    update_schedule: "weekly"
-    version_requirement_updates: "increase_versions_if_necessary"

.github/dependabot.yml

@@ -0,0 +1,24 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
+  versioning-strategy: increase-if-necessary
+  ignore:
+  - dependency-name: karma
+    versions:
+    - 6.3.2
+  - dependency-name: webpack
+    versions:
+    - 5.27.1
+    - 5.27.2
+    - 5.28.0
+    - 5.30.0
+  - dependency-name: rollup
+    versions:
+    - 2.43.1
+  - dependency-name: karma-webpack
+    versions:
+    - 5.0.0-alpha.4