Upgrade to GitHub-native Dependabot (#491)

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

Author: dependabot-preview[bot]

.github/dependabot.yml

@@ -0,0 +1,23 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: semver
+    versions:
+    - 7.3.5
+  - dependency-name: eslint
+    versions:
+    - 7.23.0
+  - dependency-name: "@solidity-parser/parser"
+    versions:
+    - 0.12.0
+  - dependency-name: emoji-regex
+    versions:
+    - 9.2.2
+  - dependency-name: string-width
+    versions:
+    - 4.2.1