Conversion of л and е, ё, ю, я after it for lacinka style

Major update due to changes of the official instruction on transliteration of geographical names.

Changed

• Breaking: geographical option changed into geo-2000
• Bump jest to v29.5.0
• Internal data structure

Added

• geo-2023 style option

Removed

• Breaking: slugify style option and @sindresorhus/slugify dependency
• Breaking: geographical style option. Use geo-2000 instead

Minor variables cleanup, more examples added to README.

Initial release