v1.3.5

This is a minor release that resolves two serious, but rarely experienced, issues:

#508 Resolve send on closed channel when order=false and connection closed - @MattBrittan (thanks to @thomas-tacquet for raising this issue and suggesting a solution #504 )
#512 Resolve rare deadlock caused by loss of connection (in particular circumstances) - @MattBrittan (thanks to @dehort for raising #509 and providing the detailed logging needed to trace this)