Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,35 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "04:00"
+  open-pull-requests-limit: 10
+  reviewers:
+  - shekhar-shubhendu
+  - noandrea
+  labels:
+  - dependabot
+  - dependencies
+  ignore:
+  - dependency-name: sphinx
+    versions:
+    - 3.4.3
+    - 3.5.0
+    - 3.5.1
+    - 3.5.2
+    - 3.5.3
+  - dependency-name: flake8
+    versions:
+    - 3.8.4
+    - 3.9.0
+  - dependency-name: coverage
+    versions:
+    - "5.4"
+  - dependency-name: pytest
+    versions:
+    - 6.2.2
+  - dependency-name: deprecated
+    versions:
+    - 1.2.11