pin sparse to 0.9.1

Zethson · web-flow · commit 6f00abb341bb · 2021-05-31T10:48:35.000+02:00
fixes #194
diff --git a/requirements.txt b/requirements.txt
@@ -12,4 +12,4 @@ sphinx-autodoc-typehints
 sphinx_rtd_theme
 jinja2
 docutils
-
+sparse==0.9.1
