fix docs

docs/conf.py

@@ -31,7 +31,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
- 'm2r',
+ 'm2r2',
  'nbsphinx',
  'sphinx.ext.autodoc',
  'sphinx.ext.githubpages',

setup.py

@@ -47,14 +47,23 @@
  'watchdog>=0.8.3,<0.11',
 
  # docs
- 'm2r>=0.2.0,<0.3',
+ 'docutils>=0.12,<0.18',
+ 'm2r2>=0.2.5,<0.3',
  'nbsphinx>=0.5.0,<0.7',
- 'Sphinx>=1.7.1,<3',
+ 'Sphinx>=3,<3.3',
  'sphinx_rtd_theme>=0.2.4,<0.5',
  'autodocsumm>=0.1.10',
- 'mistune>=0.7,<2',
- 'Jinja2<3.1',
-
+ 'Jinja2>=2,<3.1',
+
+ # fails on Sphinx < v3.4
+ 'alabaster<=0.7.12',
+ # fails on Sphins < v5.0
+ 'sphinxcontrib-applehelp<1.0.8',
+ 'sphinxcontrib-devhelp<1.0.6',
+ 'sphinxcontrib-htmlhelp<2.0.5',
+ 'sphinxcontrib-serializinghtml<1.1.10',
+ 'sphinxcontrib-qthelp<1.0.7',
+
  # style check
  'flake8>=3.7.7,<4',
  'isort>=4.3.4,<5',