update font to v15.4.2

Summary:
Changes since v.15.1.0

• Add top-cut variants of 1
• Add characters
• Ascender height and Cap can be configured separately now
• Fix ranks of cv72 (variants applying to 1)
• Fix VXDD application on U+1D1E
• Fix display of Kleisli arrows under Kitty
• Make user build plans' variants inheritable
• Pilcrow signs are adjusted to have fills.
• Shape adjustment of t

Test Plan: display text in editor of choice

Reviewers: Triage Team, Staudey

Reviewed By: Staudey

Subscribers: Staudey

Differential Revision: https://dev.getsol.us/D13241