Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,27 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: autopep8
+    versions:
+    - 1.5.4
+    - 1.5.5
+  - dependency-name: pytest
+    versions:
+    - 6.2.2
+  - dependency-name: isort
+    versions:
+    - 5.7.0
+  - dependency-name: packaging
+    versions:
+    - "20.8"
+  - dependency-name: lazy-object-proxy
+    versions:
+    - 1.5.2
+  - dependency-name: more-itertools
+    versions:
+    - 8.6.0