<NME> mysql-requirements.txt
<BEF> mysqlclient<2.0.4

<MSG> Merge pull request #2407 from modoboa/dependabot/pip/mysqlclient-lt-2.1.1

Update mysqlclient requirement from <2.0.4 to <2.1.1
<DFF> @@ -1,1 +1,1 @@
-mysqlclient<2.0.4
+mysqlclient<2.1.1

Merge pull request #2407 from modoboa/dependabot/pip/mysqlclient-lt-2.1.1