Type inference for `MemberExpressions` v0.3.0-beta.1
Type inference for `MemberExpressions` v0.3.0-beta.1

- Add `memberExprType` function
- Add `getPathToProp` and `getTypeOfChild`
- Add `parentIsObject` and `parentIsArray`

cleanlang/clean,cleanlang/clean,cleanlang/clean