Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,53 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "10:00"
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: tokio
+    versions:
+    - ">= 0.3.a, < 0.4"
+  - dependency-name: hyper
+    versions:
+    - 0.14.4
+    - 0.14.6
+  - dependency-name: serde_json
+    versions:
+    - 1.0.62
+    - 1.0.63
+    - 1.0.64
+  - dependency-name: tracing
+    versions:
+    - 0.1.24
+    - 0.1.25
+  - dependency-name: futures
+    versions:
+    - 0.3.12
+    - 0.3.13
+  - dependency-name: url
+    versions:
+    - 2.2.1
+  - dependency-name: thiserror
+    versions:
+    - 1.0.24
+  - dependency-name: tracing-futures
+    versions:
+    - 0.2.5
+  - dependency-name: serde
+    versions:
+    - 1.0.123
+  - dependency-name: rand
+    versions:
+    - 0.8.3
+  - dependency-name: log
+    versions:
+    - 0.4.14
+  - dependency-name: serde_yaml
+    versions:
+    - 0.8.16
+  - dependency-name: tokio
+    versions:
+    - 1.1.1