Chore: Bump version to 0.13.1 for release parity

Author: Evilpasture

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "scikit_build_core.build"
 
 [project]
 name = "culverin"
-version = "0.13.0"
+version = "0.13.1"
 description = "High-performance Jolt Physics bindings for Python featuring Shadow Buffers and Free-Threading support."
 readme = "README.md"
 requires-python = ">=3.12"
@@ -104,4 +104,4 @@ ignore = [
 ]
 
 [tool.ruff.lint.isort]
-known-first-party = ["culverin"]
+known-first-party = ["culverin"]