Support 歴史的仮名遣い

[jet082]

As it says on the title, it would be nice to be able to automatically change ゑ to え, even を to お (as in をとこ). As well as be able to automatically transform けふ to きょう, くわ to か, げう to ぎょう etc.

I'm sure you know this very well, but there is also a convenient list here if it is helpful: https://www.bunka.go.jp/kokugo_nihongo/sisaku/joho/joho/kijun/naikaku/gendaikana/index.html