Update Cygwin build

Run tests against system's tig when SYSTEM_TIG=1

Document %(status)

Fix repo info in bare repository with no HEAD

Bump copyright year to 2026

Handle the NO_COLOR environment variable

Minor tweaks to the blame view

Fix grep with revision argument

Reset view->parent both when switching and closing view

Honor init_size in string_map_put_to()

Update compat/hashtab.c with latest libiberty version

Fix notes handling in the main view

Update manual link to point to mankier.com and remove link to Gitter

tig-2.6.0

Update NEWS