Add support for clang 13.0

[paddyroddy]

Looks like conan has been updated to support it conan-io/conan#9643 but clearly however pyssht uses it doesn't reflect that update

pip intall pyssht

Collecting pyssht
  Using cached pyssht-1.5.1.tar.gz (78 kB)
  Installing build dependencies ... \\done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Collecting scipy
  Downloading scipy-1.7.2-cp39-cp39-macosx_10_9_x86_64.whl (33.2 MB)
     |████████████████████████████████| 33.2 MB 9.7 MB/s
Collecting numpy
  Downloading numpy-1.21.4-cp39-cp39-macosx_10_9_x86_64.whl (17.0 MB)
     |████████████████████████████████| 17.0 MB 9.3 MB/s
Building wheels for collected packages: pyssht
  Building wheel for pyssht (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: /Users/paddy/miniforge3/bin/python /Users/paddy/miniforge3/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py build_wheel /var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/tmpfhp9075e
       cwd: /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6
  Complete output (76 lines):
  Not searching for unused variables given on the command line.
  -- The C compiler identification is AppleClang 13.0.0.13000029
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc - skipped
  -- Detecting C compile features
  -- Detecting C compile features - done
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_cmake_test_compile/build
  -- The C compiler identification is AppleClang 13.0.0.13000029
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc - skipped
  -- Detecting C compile features
  -- Detecting C compile features - done
  -- Downloading conan.cmake from https://github.com/conan-io/cmake-conan
  -- Conan: checking conan executable
  -- Conan: Found program /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-build-env-kv4g_3pc/overlay/bin/conan
  -- Conan: Version found Conan version 1.42.1

  -- Conan executing: /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-build-env-kv4g_3pc/overlay/bin/conan install /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/conanfile.txt --remote conancenter --generator cmake_find_package --generator cmake_paths --build missing --settings build_type=Release --settings compiler=apple-clang --settings compiler.version=13.0
  ERROR: Invalid setting '13.0' is not a valid 'settings.compiler.version' value.
  Possible values are ['5.0', '5.1', '6.0', '6.1', '7.0', '7.3', '8.0', '8.1', '9.0', '9.1', '10.0', '11.0', '12.0']
  Read "http://docs.conan.io/en/latest/faq/troubleshooting.html#error-invalid-setting"
  CMake Error at _skbuild/macosx-10.16-x86_64-3.9/cmake-build/conan.cmake:631 (message):
    Conan install failed='1'
  Call Stack (most recent call first):
    cmake/conan_dependencies.cmake:12 (conan_cmake_install)
    CMakeLists.txt:17 (include)


  -- Configuring incomplete, errors occurred!
  See also "/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_skbuild/macosx-10.16-x86_64-3.9/cmake-build/CMakeFiles/CMakeOutput.log".
  See also "/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_skbuild/macosx-10.16-x86_64-3.9/cmake-build/CMakeFiles/CMakeError.log".
    File "/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-build-env-kv4g_3pc/overlay/lib/python3.9/site-packages/skbuild/setuptools_wrap.py", line 586, in setup
      env = cmkr.configure(cmake_args,
    File "/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-build-env-kv4g_3pc/overlay/lib/python3.9/site-packages/skbuild/cmaker.py", line 237, in configure
      raise SKBuildError(


  --------------------------------------------------------------------------------
  -- Trying "Ninja" generator
  --------------------------------
  ---------------------------
  ----------------------
  -----------------
  ------------
  -------
  --
  --
  -------
  ------------
  -----------------
  ----------------------
  ---------------------------
  --------------------------------
  -- Trying "Ninja" generator - success
  --------------------------------------------------------------------------------

  Configuring Project
    Working directory:
      /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_skbuild/macosx-10.16-x86_64-3.9/cmake-build
    Command:
      cmake /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6 -G Ninja -DCMAKE_INSTALL_PREFIX:PATH=/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_skbuild/macosx-10.16-x86_64-3.9/cmake-install -DPYTHON_EXECUTABLE:FILEPATH=/Users/paddy/miniforge3/bin/python -DPYTHON_VERSION_STRING:STRING=3.9.7 -DPYTHON_INCLUDE_DIR:PATH=/Users/paddy/miniforge3/include/python3.9 -DPYTHON_LIBRARY:FILEPATH=/Users/paddy/miniforge3/lib/libpython3.9.dylib -DSKBUILD:INTERNAL=TRUE -DCMAKE_MODULE_PATH:PATH=/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-build-env-kv4g_3pc/overlay/lib/python3.9/site-packages/skbuild/resources/cmake -DBUILD_TESTING:BOOL=OFF -Dconan_deps=ON -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_BUILD_TYPE:STRING=Release -DCMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.16 -DCMAKE_OSX_ARCHITECTURES:STRING=x86_64

  Traceback (most recent call last):

  An error occurred while configuring with CMake.
    Command:
      cmake /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6 -G Ninja -DCMAKE_INSTALL_PREFIX:PATH=/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_skbuild/macosx-10.16-x86_64-3.9/cmake-install -DPYTHON_EXECUTABLE:FILEPATH=/Users/paddy/miniforge3/bin/python -DPYTHON_VERSION_STRING:STRING=3.9.7 -DPYTHON_INCLUDE_DIR:PATH=/Users/paddy/miniforge3/include/python3.9 -DPYTHON_LIBRARY:FILEPATH=/Users/paddy/miniforge3/lib/libpython3.9.dylib -DSKBUILD:INTERNAL=TRUE -DCMAKE_MODULE_PATH:PATH=/private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-build-env-kv4g_3pc/overlay/lib/python3.9/site-packages/skbuild/resources/cmake -DBUILD_TESTING:BOOL=OFF -Dconan_deps=ON -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_BUILD_TYPE:STRING=Release -DCMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.16 -DCMAKE_OSX_ARCHITECTURES:STRING=x86_64
    Source directory:
      /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6
    Working directory:
      /private/var/folders/_c/43kmhsb94tn3922mqy9gl2000000gn/T/pip-install-5xr1arb5/pyssht_3231792106434516895c500f2985c5a6/_skbuild/macosx-10.16-x86_64-3.9/cmake-build
  Please see CMake's output for more information.
  ----------------------------------------
  ERROR: Failed building wheel for pyssht
Failed to build pyssht
ERROR: Could not build wheels for pyssht which use PEP 517 and cannot be installed directly