Upgrade to GitHub-native Dependabot

Author: dependabot-preview[bot]

.github/dependabot.yml

@@ -0,0 +1,19 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "10:00"
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: black
+    versions:
+    - 21.4b0
+    - 21.4b1
+  - dependency-name: python-dotenv
+    versions:
+    - 0.16.0
+  - dependency-name: pytest
+    versions:
+    - 6.2.2