teko_std 0.25.2

v0.25.2: in lockstep with teko 0.25.3 on mc 1.0.1

teko v0.25.3 refuses an index whose base name binds nearer than the global
array it was rewritten against (teko-lang #760, D96). The library's own
sources do not change: strings.tk declares no global array and shadows no
name.

[deps] teko, the mc.lock row, the build config and the README all move to
0.25.3, tree hash
e5c9bc660c134d7dd17ef06c5fe72b6372a94ee1c1e4e52b24a4f8673b2edea6.

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 v0.25.3 and running every fixture with it, plus the
language check.

Pinned dependency: teko 0.25.3

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.