Let the labeler assign "aspect: binary formats", "python" and more "CI"

- "aspect: binary formats" for changes to the binary reader or writer,
  their tests, fuzzers and docs, or with a binary format in the title;
- "python" for Python sources and pip requirements files, matching the
  label Dependabot sets on its pip updates, so it is never removed there;
- "CI" also for changes to the Dependabot and labeler configurations.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

.github/labeler.yml

@@ -29,6 +29,27 @@ labels:
   files:
     - ".github/external_ci/.*"
 
+- label: "CI"
+  files:
+    - ".github/(dependabot|labeler)\\.yml"
+
+- label: "aspect: binary formats"
+  files:
+    - "include/nlohmann/detail/input/binary_reader\\.hpp"
+    - "include/nlohmann/detail/output/binary_writer\\.hpp"
+    - "tests/src/unit-(bson|cbor|msgpack|ubjson|bjdata|binary_formats)"
+    - "tests/src/fuzzer-parse_(bson|cbor|msgpack|ubjson|bjdata)"
+    - "docs/mkdocs/docs/features/binary_formats/"
+    - "docs/mkdocs/docs/(api/basic_json|examples)/(to|from)_(bson|cbor|msgpack|ubjson|bjdata)"
+
+- label: "aspect: binary formats"
+  title: "(?i)(bson|cbor|msgpack|messagepack|ubjson|bjdata|binary format)"
+
+- label: "python"
+  files:
+    - "\\.py$"
+    - "requirements[^/]*\\.txt$"
+
 - label: "S"
   size-below: 10
 - label: "M"