v6.0.0

Changelog

• e7fc304 Merge pull request #10 from ripta/goreleaser
• c6d105b Merge pull request #11 from ripta/typed-fields
• 881f916 pkg/mj: add better unit test coverage for bools
• fbe8527 pkg/mj: add support for primitive types
• 6058372 pkg/mj: add support for true zero values
• f5bc230 pkg/mj: arrays can actually contain heterogeneous elements
• 3b1ea79 pkg/mj: fix test runner to properly bubble up exit codes
• da9579f pkg/mj: move array pattern before type, in case we want any key in path to be an array in the future
• 66462a6 pkg/mj: require null types to be empty (seems less confusing that way)