Synchronize with scikit-build

scikit-build commit 94089992b353ea3e4b4c2f118ea1987ca54ecbb8:
skbuild/setuptools_wrap.py:_classify_installed_files
    cmake_install_dir -> _cmake_install_dir

This allows tracking scikit-build versions >= 0.13.2. The dependencies
file has been updated.

pyproject.toml

 [build-system]
 requires = [
-  "setuptools", "wheel", "scikit-build", "cmake", "pip",
+  "setuptools", "wheel", "cmake", "pip",
+  "scikit-build>=0.13.2",
   "numpy==1.13.3; python_version=='3.6' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
   "numpy==1.14.5; python_version=='3.7' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
   "numpy==1.17.3; python_version=='3.8' and platform_machine != 'aarch64' and platform_machine != 'arm64'",

setup.py

@@ -451,7 +451,7 @@ class RearrangeCMakeOutput(object):
             data_files,
             # To get around a check that prepends source dir to paths and breaks package detection code.
             cmake_source_dir="",
-            cmake_install_dir=cmake_install_reldir,
+            _cmake_install_dir=cmake_install_reldir,
         )