Merge pull request #19 from traP-jp/installDependabot

added `dependabot.yml`

.github/dependabot.yml

@@ -0,0 +1,28 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: '/'
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 10
+    groups:
+      types:
+        patterns:
+          - '@types/*'
+      lint-formatter:
+        patterns:
+          - '*eslint*'
+          - '*prettier*'
+      patches:
+        update-types:
+          - 'patch'
+
+  - package-ecosystem: github-actions
+    directory: '/'
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 10
+    groups:
+      actions-deps:
+        patterns:
+          - '*'