chore: configure weekly dependabot version upgrades (#95)

Author: skyrpex

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    ignore:
+      - dependency-name: "@types/vscode"
+    groups:
+      dev-dependencies:
+        dependency-type: "development"