v7.0.0

Breaking changes:

• Update project and deps to PureScript v0.15.0 (#72 by @JordanMartinez)
• Replaced polymorphic proxies with monomorphic Proxy (#72 by @JordanMartinez)

New features:

• Added # infix operator for FLIP (e.g. Int # Maybe == Maybe Int) (#73 by @JordanMartinez)