Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,37 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: weekly
+    time: "10:00"
+  open-pull-requests-limit: 10
+  reviewers:
+  - manish
+  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: setuptools-scm
+    versions:
+    - 5.0.1
+    - 5.0.2
+  - dependency-name: dask
+    versions:
+    - 2021.1.1
+    - 2021.2.0
+  - dependency-name: pytest
+    versions:
+    - 6.2.1
+    - 6.2.2
+  - dependency-name: bleach
+    versions:
+    - 3.1.4