5.0.0

Fixed

• When a custom mapping was provided in options and then a different one was given, we only replaced the mapping with the new one when a previous one did not exist. Now we will always replace the custom mapping when it changes. #132

Added

• Support for converting some k-- constructions. #126
• Allow user to ignore converting long vowel mark in toHiragana. #128

Changed

• The UMD build now only includes polyfills for browserslist defaults (> 0.5%, last 2 versions, Firefox ESR, not dead - at time of writing) which drops support for IE.
• Node support is now 12+ (though likely would continue to work fine on older versions)