infra: add sourcery config

.sourcery.yaml

@@ -0,0 +1,42 @@
+ignore:
+  - .tox/
+  - .venv/
+  - dist/
+  - docs/_build/
+  - docs/_static/
+  - node_modules/
+  - vendor/
+  - venv/
+
+rule_settings:
+  enable: [default]
+  disable: [dont-import-test-modules]
+  rule_types:
+    - refactoring
+    - suggestion
+    - comment
+  python_version: "3.8"
+
+rules: []
+
+metrics:
+  quality_threshold: 25.0
+
+github:
+  ignore_labels:
+    - sourcery-ignore
+    - docs
+  labels:
+    - build-ignore
+  request_review:
+    origin: owner
+    forked: author
+  sourcery_branch: sourcery/{base_branch}
+
+clone_detection:
+  min_lines: 3
+  min_duplicates: 2
+  identical_clones_only: false
+
+proxy:
+  no_ssl_verify: false