Homograph 地 (dì/de) support

[foreignfilm]

Hello Mengshen team. First of all, thank you for your hard work on this project and for sharing the font on GitHub! Your approach to using modern font features to handle Chinese homographs is brilliant.

I'm having some trouble displaying the character 地 correctly. See: https://en.wiktionary.org/wiki/地

This character most commonly stands for dì as in 地铁 — dì tiě. However, Mengshen seems to only be aware of its other pronunciation de as in 很快地 ― hěn kuài de.

Is it possible to correct this? If it isn't possible to reliably detect dì vs de, I wonder if the dì variant is a more appropriate default pick, as that's a more common use of this character in Mandarin.