Kolibri-sync-extras-plugin

Summary
- Updates the plugin to be compatible with Kolibri 0.16

What's Changed
* upgrade queue mechanisms to kolibri 0.16 by jredrejo in https://github.com/learningequality/kolibri-sync-extras-plugin/pull/9

New Contributors
* jredrejo made their first contribution in https://github.com/learningequality/kolibri-sync-extras-plugin/pull/9

**Full Changelog**: https://github.com/learningequality/kolibri-sync-extras-plugin/compare/v0.1.3...v0.2.0

What's Changed
* Resolve issue with deserializing_operations not returning the correct operations by bjester in https://github.com/learningequality/kolibri-sync-extras-plugin/pull/6


**Full Changelog**: https://github.com/learningequality/kolibri-sync-extras-plugin/compare/v0.1.2...v0.1.3

- Resolves issue `Job objects need to be JSON-serializable: Object of type set is not JSON serializable`
- Fixes missing check for whether the options are enabled, not just the stages

- Fixes manifest issue excluding source files causing `No module named 'kolibri_sync_extras_plugin.sync'`

Initial release