dillon1000/react

Rename Environment => State for infer reference effects for clarity

InferReferenceEffects needs to be able to pass around the function's 
Environment, but there is already a local class with that name. It's confusing 
to have two "environment" concepts in one file, so this PR renames that local 
class to the more appropriate `InferenceState` and renames local variables and 
updates comments accordingly.