Upgrade to GitHub-native Dependabot

Author: dependabot-preview[bot]

.github/dependabot.yml

@@ -0,0 +1,40 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "07:00"
+    timezone: America/Los_Angeles
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: bandit
+    versions:
+    - "> 1.5.1"
+  - dependency-name: sqlalchemy
+    versions:
+    - 1.3.23
+    - 1.4.0
+    - 1.4.1
+    - 1.4.10
+    - 1.4.2
+    - 1.4.3
+    - 1.4.4
+    - 1.4.5
+    - 1.4.6
+    - 1.4.7
+    - 1.4.8
+    - 1.4.9
+  - dependency-name: prometheus-client
+    versions:
+    - 0.10.0
+  - dependency-name: alembic
+    versions:
+    - 1.5.2
+    - 1.5.4
+    - 1.5.5
+    - 1.5.6
+    - 1.5.7
+  - dependency-name: cryptography
+    versions:
+    - 3.4.1