Upgrade to GitHub-native Dependabot

Author: dependabot-preview[bot]

.github/dependabot.yml

@@ -0,0 +1,39 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: monthly
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: libc
+    versions:
+    - 0.2.84
+    - 0.2.86
+  - dependency-name: serde_json
+    versions:
+    - 1.0.64
+  - dependency-name: reqwest
+    versions:
+    - 0.11.1
+  - dependency-name: rocket
+    versions:
+    - 0.4.7
+  - dependency-name: rocket_contrib
+    versions:
+    - 0.4.7
+  - dependency-name: regex
+    versions:
+    - 1.4.3
+  - dependency-name: uuid
+    versions:
+    - 0.8.2
+  - dependency-name: serde
+    versions:
+    - 1.0.123
+  - dependency-name: multipart
+    versions:
+    - 0.17.1
+  - dependency-name: log
+    versions:
+    - 0.4.14