Upgrade to GitHub-native Dependabot (#516)

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: y18n
+    versions:
+    - 4.0.1
+    - 4.0.2
+  - dependency-name: husky
+    versions:
+    - 5.0.9
+    - 5.1.0
+    - 5.1.1
+    - 5.1.2
+    - 5.1.3
+    - 5.2.0
+  - dependency-name: elliptic
+    versions:
+    - 6.5.3