Upgrade to GitHub-native Dependabot (#164)

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

.github/dependabot.yml

@@ -0,0 +1,46 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "04:00"
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: pbkdf2
+    versions:
+    - 0.6.0
+    - 0.7.1
+    - 0.7.2
+    - 0.7.3
+    - 0.7.4
+  - dependency-name: bootloader
+    versions:
+    - 0.9.14
+  - dependency-name: smoltcp
+    versions:
+    - 0.7.0
+  - dependency-name: volatile
+    versions:
+    - 0.4.3
+  - dependency-name: spin
+    versions:
+    - 0.7.1
+  - dependency-name: time
+    versions:
+    - 0.2.25
+  - dependency-name: array-macro
+    versions:
+    - 2.0.0
+  - dependency-name: linked_list_allocator
+    versions:
+    - 0.8.11
+  - dependency-name: rand_core
+    versions:
+    - 0.6.1
+  - dependency-name: x86_64
+    versions:
+    - 0.13.1
+  - dependency-name: sha2
+    versions:
+    - 0.9.2