doc/requirements: update

Signed-off-by: Unai Martinez-Corral <[email protected]>

Author: umarcor

doc/requirements.txt

@@ -2,7 +2,7 @@
 # used by Read The Docs to install python required
 # modules with pip.
 
-Sphinx==3.1
+sphinx
 sphinx_rtd_theme
 
 # Support custom domains
@@ -16,16 +16,8 @@ myst_parser
 git+https://github.com/SymbiFlow/sphinxcontrib-markdown-symlinks
 
 #Handle references in bibtex format
-#
-# To work around citations not resolving we need to use a version < 1 (0.4.2 is the latest), until
-# we upgrade to using sphinx-2.0
-sphinxcontrib-bibtex==0.4.2
-
-#Work-around bug "AttributeError: 'Values' object has no attribute 'character_level_inline_markup'" with docutils 0.13.1
-#See:
-#  * https://github.com/sphinx-doc/sphinx/issues/3951
-#  * https://sourceforge.net/p/docutils/bugs/304/
-docutils==0.17.1
+
+sphinxcontrib-bibtex
 
 #Generates a project specific 404 (page not found) page
 sphinx-notfound-page

doc/src/conf.py

@@ -72,6 +72,7 @@
 
 if have_sphinxcontrib_bibtex:
     extensions.append("sphinxcontrib.bibtex")
+    bibtex_bibfiles = ["z_references.bib"]
 else:
     print(
         "Warning: Could not find sphinxcontrib.bibtex for managing citations, attempting to build anyway..."