# 0.1.1
* Define `attached` destructor for `Product` datatype
* Define `empty` destructor for `Stack` structure
* Replace `flip` on `?` type operator
* Remove type parameter from `Stack` type synonymous
* Split `structure` and `value` in `Nonempty` type family
* Define `Invariant` instance for `Constant` datatype
* Remove all `Invariant` methods except `invmap`
* Extract `Junction` module from `Basis`

# 0.1.2
* Define `Pipeline` control flow paradigm
* Split `Structure` modules on `Property` and `Concrete`
* Define `Hollow` type class for handling empty structures
* Extract `Nonempty` into a separated module
* Define `Graph` concrete structure
* Define infix `:-.` type operator for Lens
* Define `Object` instances for `Product` datatype