Remove trailing unit

What's Changed

• Support for [email protected]
• Fix type for ThrowsExpectation.Message.fn

Full Changelog: v2.1.0...v2.3.0

• Update throws and notThrows callbacks return type from unit to 'a
• Update throwsAsync and notThrowsAsync value type from promise<unit> to promise<'a>

What's Changed

• Update rescript up to 10.1.x
• Update ava up to 5.1.x
• Improve ThrowsExpectation bindings. Make them runtime free and more convenient to use
• Add Only.failing and Only.asyncFailing for convenience
• Use promise instead of Js.Promise.t

By @DZakh in #1

Full Changelog: v1.0.0...v2.0.0

• Improve bindings API
• Start using [email protected]

• Remove type: module from package.json

• Redesign bindings to make them work with es6 module resolution.
• Better async support

Use [email protected]

Update ava installation instructions

Fix installation process