Speed up mypy scans with its faster-cache extra

This extra "just" installs and uses orjson in place of stdlib json.

orjson is 10x faster to serialize and 2x faster to deserialize.

https://github.com/ijl/orjson?tab=readme-ov-file#performance

Author: colindean

poetry.lock

@@ -38,7 +38,7 @@ pytest-cov = "*"
 # opinionated code formatter
 black = ">=22"
 # type hints checker
-mypy = "*"
+mypy = { version = "*", extras = ["faster-cache"] }
 # xml library, used for outputting HTML reports from mypy, etc.
 lxml = "*"
 # lightning fast linter and style checker