Fix skbuild using too new metadata version

scikit-build-core set the metadata version to 2.2 that is not yet supported by PyPI.

This was due to a dynamic pyproject.toml section being used.
pypi/warehouse#9660

CMakeLists.txt

@@ -60,9 +60,8 @@ if(MSVC)
 endif()
 
 ## Python bindings
-
-set(BUILD_PYTHON FALSE CACHE BOOL "Build a Python module in addition to the library")
-if(BUILD_PYTHON)
+option(BUILD_PYTHON "Build velodyne_decoder_pylib Python module" FALSE)
+if(BUILD_PYTHON OR SKBUILD)
   find_package(Python REQUIRED COMPONENTS Interpreter Development.Module)
   find_package(pybind11 CONFIG REQUIRED)
 

pyproject.toml

@@ -16,7 +16,6 @@ keywords = [
 license = {text = "BSD-3-Clause"}
 classifiers = [
     "License :: OSI Approved :: BSD License",
-    "Programming Language :: Python :: 2",
     "Programming Language :: Python :: 3",
     "Operating System :: OS Independent",
 ]
@@ -26,10 +25,6 @@ dependencies = [
     "dpkt",
     "pyyaml",
 ]
-dynamic = ["optional-dependencies"]
-
-[tool.setuptools.dynamic]
-optional-dependencies.tests = { file = ["requirements-dev.txt"] }
 
 [project.scripts]
 extract-hdl64e-calibration = "velodyne_decoder.hdl64e:cli"
@@ -63,7 +58,7 @@ BUILD_SHARED_LIBS = false
 build = "*"
 # Disable building of PyPy wheels on all platforms
 skip = "pp*"
-before-test = "pip install -r {project}/requirements-dev.txt --extra-index-url https://rospypi.github.io/simple/ --upgrade --upgrade-strategy eager"
+before-test = "pip install -r {project}/requirements-dev.txt"
 test-command = "pytest {project}/test --color=yes -v"
 build-verbosity = 1
 archs = "auto64"

requirements-dev.txt

@@ -1,4 +1,4 @@
-# --extra-index-url https://rospypi.github.io/simple/
+--extra-index-url https://rospypi.github.io/simple/
 pytest
 requests
 rosbag