teko_std 0.27.0

v0.27.0: in lockstep with teko 0.27.0 on mc 1.0.1

teko v0.27.0 teaches the jagged array (teko-lang #764, D100). A minor there,
so a minor here. The library's own sources do not change.

Tree hash 5d80572c2334ce1d29cefb35a792c4d0134080cba6e76b8729460d7672a948bb.

Gate, macos/aarch64, mc 1.0.1: strings_test 42, strings_panic_test 70,
'ok language: 19 tracked sources carry no Portuguese'.

Proven by the teko_std CI gate over this tag: two native legs
(linux/x86_64, macos/aarch64), each building the taught teko compiler
from teko v0.27.0 and running every fixture with it, plus the
language check.

Pinned dependency: teko 0.27.0

No binaries are attached: this is a source library, and the archive a
consumer (or the mc registry) fetches is this tag's own source archive.