* Multibyte character support for lsp#get_position()
* Multibyte character support for "textDocument/documentHighlight"
* Fix `lsp#utils#byteindex()` would fails if a file is not yet loaded
* Add tests
* Rename lsp#utils#byteindex() and lsp#utils#charindex()
lsp#utils#byteindex() -> lsp#utils#to_col()
lsp#utils#charindex() -> lsp#utils#to_char()
* Multibyte character support for textEdit
* Remove unused line
* Multibyte character support for "textDocument/rangeFormatting"
* Multibyte character support for "textDocument/publishDiagnostics"