v0.4.0

Changelog

• cac1a79 fix: encode query URL when opening search
• ceb069d add go mod tidy make target
• 8c6d034 add test make target
• 20acca9 add unit tests
• f32a93f refactor: rename types, reorganize funcs
• 91624f4 allow passing http client for tests
• 7e02427 add doc types