Merge pull request #8487 from readthedocs/humitos/update-orjson

Requirement: update orjson

Author: humitos

requirements/pip.txt

@@ -57,8 +57,8 @@ pyquery==1.4.3
 # NOTE: this dep can be removed in python 3.7 in favor of ``date.fromisoformat``
 python-dateutil==2.8.2
 
-# Ignoring orjson for now because it makes Travis to fail
-orjson==2.0.7  # pyup: ignore
+# Version 3.6.3 is not available for Python 3.6
+orjson==3.6.1  # pyup: ignore
 
 # Utils
 django-gravatar2==1.4.4