Upgrade to GitHub-native Dependabot (#9)

* Upgrade to GitHub-native Dependabot

* ci: Adjust dependabot time

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Jérôme Laban <jerome.laban@nventive.com>

.dependabot/config.yml

@@ -1,9 +0,0 @@
-version: 1
-update_configs:
-  - package_manager: "dotnet:nuget"
-    directory: "/"
-    update_schedule: "weekly"
-
-    default_labels:
-      - "kind/dependency"
-      - "do-not-merge/work-in-progress"

.github/dependabot.yml

@@ -0,0 +1,18 @@
+version: 2
+updates:
+- package-ecosystem: nuget
+  directory: "/"
+  schedule:
+    interval: weekly
+    time: "01:00"
+  open-pull-requests-limit: 10
+  labels:
+  - kind/dependency
+  - do-not-merge/work-in-progress
+  ignore:
+  - dependency-name: Uno.Foundation.Runtime.WebAssembly
+    versions:
+    - ">= 3.5.a, < 3.6"
+  - dependency-name: Uno.Foundation.Runtime.WebAssembly
+    versions:
+    - 3.4.0