Update dependency mysqlclient to v2.2.0

Author: renovate[bot]

requirements.txt

@@ -3,7 +3,7 @@ ddtrace==0.44.0; (python_version >= "2.7" and python_full_version < "3.0.0") or
 django-environ==0.4.5
 django==3.1.4; python_version >= "3.6"
 intervaltree==3.1.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
-mysqlclient==2.0.1; python_version >= "3.5"
+mysqlclient==2.2.0; python_version >= "3.5"
 protobuf==3.14.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
 python-dotenv==0.15.0
 pytz==2020.4; python_version >= "3.6"