Fixing pip install basemap issue

[taddyb]

Added:

• Removed the deprecated basemap from plot.py and requirements/environment files
• added cartopy to requirements.txt and environment.yml

Issues referenced:

#19 #20

[taddyb]

@JiangtaoLiud we need to update the version of hydroDL on pypi:

(test) [email protected]@e5-ce-csr-s2001:/data/tkb5476/projects/hydroDL$ pip install hydroDL
Collecting hydroDL
  Using cached hydroDL-0.1.3-py3-none-any.whl (84 kB)
INFO: pip is looking at multiple versions of hydrodl to determine which version is compatible with other requirements. This could take a while.
  Using cached hydroDL-0.1.2-py3-none-any.whl (84 kB)
  Using cached hydroDL-0.1.1-py3-none-any.whl (84 kB)
  Using cached hydroDL-0.1.0-py3-none-any.whl (84 kB)
ERROR: Cannot install hydrodl==0.1.0, hydrodl==0.1.1, hydrodl==0.1.2 and hydrodl==0.1.3 because these package versions have conflicting dependencies.

The conflict is caused by:
    hydrodl 0.1.3 depends on torch==1.7.1
    hydrodl 0.1.2 depends on torch==1.7.1
    hydrodl 0.1.1 depends on torch==1.7.1
    hydrodl 0.1.0 depends on torch==1.4.0

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
(test) [email protected]@e5-ce-csr-s2001:/data/tkb5476/projects/hydroDL$ 

It looks like the changes made to hydroDL by @kamleshcodes use torch version 2.1.1, while the pypi package relies on 1.7.1