iOS font uses emoji number characters for plaintext numbers

[mpalmerlee]

When I use the iOS font within my app (after changing the font family name as referenced in #363 to make it work), number characters are incorrectly mapped to emoji characters corresponding to the numbers, so instead of 1, 2, 3, etc... the font renders: 1️⃣2️⃣3️⃣

This is difficult to work around and the font should not convert plaintext numbers to their emoji equivalents.

[mpalmerlee]

@caseyahenson pointed me to a duplicate of this issue here: #385 (comment) it appears that even though that issue is closed others have experienced the same issue with the font: only emoji characters should render as emoji when using the font.