Describe the bug
font-variant-caps: all-small-caps broken on v4.0

To Reproduce
Steps to reproduce the behavior:

1. use css property font-variant-caps with the value all-small-caps
2. behold it only working on select few characters

Expected behavior
All characters being capitalised and then scaled down to the intended small-caps size

Screenshots

v3	v4

Environment

• OS (any)
• Chrome, Firefox, Safari
• Version of font 4.0