v3.0.0

* Allow multiple independent context stacks per thread

* Renames RuntimeContext to RuntimeContextWrapper
* Each stack item is aware of its wrapper and is able to pop itself
* Push base context on initialisation for every wrapper so that one is always inside a context
* Adds push_context and pop_context methods on RuntimeContextWrapper to simplify access when "with" syntax is not convenient
* Bump version: 2.0.0 → 3.0.0

v2.0.0

* Backwards incompatible rename of context_var_updated to context_var…

v1.3.0

* Fixes dictionary modification while iteration in context_var_update…

v1.2.2

Add EnvBase to exports

Bump version: 1.2.1 → 1.2.2

v1.2.1

Fixes hookery version spec

Bump version: 1.2.0 → 1.2.1

v1.2.0

* Updated for hookery v2 to allow simpler listening to individual con…

v1.1.0

* Allow listening to context var updates via Env.context_var_updated …

v1.0.0

* Simplified rewrite of env

* Bump version: 0.5.0 → 1.0.0

v0.5.0

* RuntimeContextEnv cannot be strictly strict because user may still …

v0.4.1

travis.yml