fix(deps): update module github.com/go-opentype/opentype to v0.13.0

[tannevaled]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/go-opentype/opentype	v0.12.0 → v0.13.0

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Release Notes

go-opentype/opentype (github.com/go-opentype/opentype)

v0.13.0: — a ceiling that a 32-bit int walked through

Compare Source

Judge a table's extent in int64

The table-directory reader refused an out-of-range table by adding two uint32s
converted with int():

off := int(be32(rec[8:]))
length := int(be32(rec[12:]))
if off+length > len(b) {

int is 32 bits on a 32-bit build, so a length of 0xFFFFFFFF becomes −1.
off+length then comes out smaller than off, the check passes a table that
is not in the file, and the slice that follows panics — b[184:183] — in a
reader whose whole purpose is to refuse a malformed font rather than crash on one.

TestParseErrors/table_out_of_range already covered this and was already
correct. It had simply never been run on a machine where an int is 32 bits.

New: the tests run on six architectures

riscv64, loong64, ppc64le, s390x (big-endian), 386 and arm (32-bit
int) — under qemu-user-static, except 386, which runs natively because
qemu-i386 loses the guest's floating-point state across the signal Go delivers
for asynchronous preemption (5 failures in 8 identical lanes emulated, 0 in 8
native).

The CI previously cross-compiled for the 64-bit four and ran on none of them.
Every big-endian lane was green from the first run — a font file is a big-endian
container, so the readers had nothing to unlearn. Both 32-bit lanes failed, and
the fix above is what they found.

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