Switch from recommonmark to myst-parser

It's the *future* and fixes a doc build error.

Related to https://github.com/readthedocs/recommonmark/issues/221

conf.py

@@ -25,7 +25,6 @@ import sys
 import urllib.parse
 import time
 
-import recommonmark
 from sphinx.transforms import SphinxTransform
 from docutils import nodes
 from sphinx import addnodes
@@ -68,8 +67,9 @@ extensions = [
     'sphinx.ext.intersphinx',
     'sphinx.ext.todo',
     'sphinx.ext.coverage',
+    'sphinx_search.extension',
     'rstjinja',
-    'recommonmark',
+    'myst_parser',
 ]
 
 # Add any paths that contain templates here, relative to this directory.

docs/requirements.txt

@@ -1,7 +1,8 @@
 sphinx<4
-recommonmark==0.6.0
+myst-parser==0.14.0
 sphinxcontrib-svg2pdfconverter==0.1.0
 astroid
 sphinx-autoapi
 isort
 black
+readthedocs-sphinx-search

requirements-dev.txt

@@ -15,9 +15,10 @@ cpp-coveralls
 # For docs
 Sphinx<4
 sphinx-rtd-theme
-recommonmark
+myst-parser
 sphinx-autoapi
 sphinxcontrib-svg2pdfconverter
+readthedocs-sphinx-search
 
 # For translate check
 polib