Include RTD configuration file and bump Sphinx version

Author: alvarolopez

.readthedocs.yml

@@ -0,0 +1,25 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: doc/source/conf.py
+
+# Build documentation with MkDocs
+#mkdocs:
+#  configuration: mkdocs.yml
+
+# Optionally build your docs in additional formats such as PDF
+formats:
+  - pdf
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.7
+  install:
+    - requirements: test-requirements.txt
+    - requirements: requirements.txt

test-requirements.txt

@@ -22,7 +22,7 @@ mock>=1.2
 pytest
 pytest-cov
 
-sphinx>=1.6.2 # BSD
+sphinx>=4.0.2
 sphinx_rtd_theme
 recommonmark
 reno>=2.5.0 # Apache-2.0

tox.ini

@@ -6,10 +6,10 @@ skipsdist = True
 [testenv]
 usedevelop = True
 basepython = python3
+install_command = pip install -U {opts} {packages}
 whitelist_externals =
   find
   rm
-install_command = pip install -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
    LC_ALL=en_US.utf-8