Add pyup ignore marker for mysqlclient 1.3.14+ (#4411)
Add pyup ignore marker for mysqlclient 1.3.14+ (#4411)

Since it's not compatible with Django <2.1 - see:
https://github.com/mozilla/treeherder/pull/4342#issuecomment-444888366

Bug 1517253 is filed for updating it once we're using newer Django.

Closes #4342.
KWierso/treeherder,edmorley/treeherder,edmorley/treeherder,KWierso/treeherder,KWierso/treeherder,edmorley/treeherder,KWierso/treeherder,edmorley/treeherder