DEP: Drop Python 3.7 support

[remi-braun]

Python 3.7 is gradually abandonned by the community. References:

• NEP-29 says numpy dropped support for Python 3.7 in December 2021.
• pandas (Drop support for Python 3.7 Drop support for Python 3.7 pandas-dev/pandas#41678)
• pyproj (DEP: Python 3.7 support DEP: Python 3.7 support pyproj4/pyproj#930)
• xarray (DEP: Drop Python 3.7 Support DEP: Drop Python 3.7 Support pydata/xarray#6138)
• rioxarray (DEP: Drop Python 3.7 support DEP: Drop Python 3.7 support corteva/rioxarray#451)

However, ArcGis Pro still uses Python 3.7 😓

So, drop Python 3.7 support as soon as ArcGis Pro supports Python 3.8 ?

[remi-braun]

Arcgis Pro seems to be using Python 3.9 in the 3.0 release, scheduled sometimes in Q2 2022

[remi-braun]

Should happen anytime soon (in fr.).
However, wait for the end of the year to settle on which ArcGis version we will be using.

[remi-braun]

geopandas has dropped support for Python 3.7 for version 0.11.0
rasterio has dropped support for Python 3.7 for version 1.3.0 (and this version is needed to support Pleiades-Neo RPC...)

[remi-braun]

Arcgis Pro 3.0 is available at SERTIT :)