4.0.0-beta-1 Fixes context when prefix is defined and context is a plain object.

Fixes a bug where member expressions within arrow functions did not work Thanks to @SamyPesse for the fix! #11

Fixes a bug where comparisons were trying to cast a symbol to a number 

Removes inspect method to ensure compat with browser. 

1.1.0 Add support for `MemberExpression.optional` (but leave support for non-standard `OptionalMemberExpression` type) Thanks to @6utt3rfly