Use noarch: python

[weiji14]

Issue:

Have one no-arch build instead of specific builds for different OSes (Linux/macOS/Windows) and Python versions (3.6, 3.7, 3.8, 3.9). See GenericMappingTools/pygmt#690 (comment)

References:

• https://conda-forge.org/docs/maintainer/knowledge_base.html#noarch-python
• https://www.anaconda.com/blog/condas-new-noarch-packages

Environment (conda list):

$ conda list

Details about conda and system ( conda info ):

$ conda info

[weiji14]

@conda-forge-admin, please add noarch: python

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-webservice.

I just wanted to let you know that I made the recipe noarch: python in #13.