Prepare v7.0.0 release (1st PS 0.15.0-compatible release) (purescript#52

)

* Update the bower dependencies

* Update Node to 14 in CI

* Update the changelog

Update CHANGELOG.md

Prepare v6.0.0 release (purescript#48)

* Update CI to build with the latest version of the compiler

* Update the bower repository URL to match the URL in the registry

* Upgrade bower dependencies

* Update the changelog

Merge pull request purescript#34 from purescript/compiler/0.12

Updates for 0.12

Merge pull request purescript#29 from matthewleon/Unfoldable1

Unfoldable1 support

Merge pull request purescript#27 from matthewleon/Foldable1

Foldable1 instance

Update .gitignore

Indexed foldable-traversable instances (purescript#23)

* FunctorWithIndex implementation

Resolves purescript#21

* FoldableWithIndex instance

* TraversableWithIndex instance

* Modify indexed instances to use Maybe index.

Merge pull request purescript#20 from purescript/ps-0.11

Update for PureScript 0.11

Merge pull request purescript#17 from purescript/remove-generics

Remove generics dependency