Reddit-experiments

What's Changed
* Fix ec test by mrlevitas in https://github.com/reddit/experiments.py/pull/33
* upgrade decider & add 'other_fields' to rust PyContext by wuyiqicc in https://github.com/reddit/experiments.py/pull/34
* Return `None` on ctx_err & change logger to info by mrlevitas in https://github.com/reddit/experiments.py/pull/35


**Full Changelog**: https://github.com/reddit/experiments.py/compare/v1.0.12-alpha...v1.0.13-alpha

What's Changed
* Update edgecontext to edge_context by mrlevitas in https://github.com/reddit/experiments.py/pull/31
* Append v2 event structs in to_event_dict() by mrlevitas in https://github.com/reddit/experiments.py/pull/32


**Full Changelog**: https://github.com/reddit/experiments.py/compare/v1.0.11-alpha...v1.0.12-alpha

What's Changed
* get_variant_without_expose (expose for HG) by mrlevitas in https://github.com/reddit/experiments.py/pull/25
* expose() by mrlevitas in https://github.com/reddit/experiments.py/pull/26
* get_variant_for_identifier() by mrlevitas in https://github.com/reddit/experiments.py/pull/27
* get_variant_for_identifier_without_expose() by mrlevitas in https://github.com/reddit/experiments.py/pull/28
* decider_context.to_event_dict() by mrlevitas in https://github.com/reddit/experiments.py/pull/30


**Full Changelog**: https://github.com/reddit/experiments.py/compare/v1.0.10-alpha...v1.0.11-alpha

Create copy of `context_fields` when logging events so the reference isn't mutated.

install_require reddit-decider in setup.py