Release v0.1.1

What's Changed

• Bump github.com/stretchr/testify from 1.7.1 to 1.8.0 by @dependabot in #44
• Bump github.com/mccutchen/go-httpbin/v2 from 2.4.0 to 2.4.1 by @dependabot in #45
• Add MIT License (though all previous versions are also under MIT license)
• Fix unexpected modification of User-Agent header.

Full Changelog: v0.1.0...v0.1.1

Release v0.1.0

v0.1.0

• Apple Silicon support (Universal Binary) on Darwin (macOS).
• arm64 builds now available.
• Update to Go 1.18.

Release v0.0.1

Initial release.