Log Message:
libpsl: updated to 0.21.2

Release v0.21.2

Increased internal label size
Meson build improvements (needs meson >= 0.60.0)
Autoconf build improvements
Add instructions on how to build from tarball
Add WSAStartup() for Windows psl tool and tests
Bump gettext version to 0.19.3
Fix stack buffer overflow WRITE 1 in domain_to_punycode()
(Relevant only when built without any IDNA library.)
Fix undefined behavior in library code
Ensures that calls to fopen() and stat() can handle largefiles
Several minor (non-functional) changes