Unhandled bounds

[btecu]

While testing filling forms I noticed a few cases where the text had really small font size.
It turned out that the issue was a negative bound, which apparently is valid.
So likely we need Math.abs(bounds.height) here:

pdf-lib/src/api/text/layout.ts

Line 50 in 581d87e

if (totalHeight > bounds.height) return fontSize - 1;