Enhance request: Extend SJIS to support JIS X 0213 (JIS2004)

[master-maintenance1-peer-connect]

kintone already supports JIS X 0213 established in 2004 . On the other hand, the cli-kintone command is data containing character codes that are not in the old sjis, and both export and import are interrupted and the following message is output. encoding: rune not supported by encoding.

It's been 17 years since 2004 when JIS X 0213 was established, so please support us now. The frequency of use of the character code added in JIS X 0213 has been increasing recently. exsample code:齟齬セ゚ ツ゚ ト゚ㇷ゚