1.10.0 Release [Unstable]

Notes:

• This release is currently unstable as it may introduce deadlocks when using it in multi threaded setup

What's Changed

• [fix] add dispatch queue sync around variable calls by @chantalchung in #149
• [release] 1.10.0 by @chantalchung in #150
• ensure thread safety

Full Changelog: 1.9.1...1.10.0