Small step, giant leap

This release brings a lot of new functionality in preparation for 1.0 that we want to make available before fully releasing. This includes:

• In-session local caching with joblib (#85, #53)
• New providers infrastructure (#91, #66)
• Tile warping so maps can be expressed in CRSs other than Web Mercator (#49)

And other minor additions:

• [API BREAK] add_basemap now returns None instead of the ax passed (#92)
• Dropping cartopy as dependency (#50)
• Use of standard tile URLs (#73)
• Attribution text wrapping (#94, #95, #96) and optional font size (#76)
• Move codebase to black style (#87)

Install through pip:

pip install contextily==1.0rc2

Or conda:

conda install -c conda-forge contextily==1.0rc2