Use list instead of the deprecated List

Replace `typing.List` for the builtin `list`, since the former has been
deprecated.

doc/conf.py

@@ -8,7 +8,6 @@
 import datetime
 
 import pooch
-import typing as t
 
 
 # Project information
@@ -45,7 +44,7 @@
 }
 
 # Autosummary pages will be generated by sphinx-autogen instead of sphinx-build
-autosummary_generate: t.List = []
+autosummary_generate: list = []
 
 # Otherwise, the Return parameter list looks different from the Parameters list
 napoleon_use_rtype = False
@@ -78,7 +77,7 @@
 html_static_path = ["_static"]
 # CSS files are relative to the static path
 html_css_files = ["style.css"]
-html_extra_path: t.List = []
+html_extra_path: list = []
 html_show_sourcelink = False
 html_show_sphinx = True
 html_show_copyright = True