Bump extension to v1.0.2 so the 'ReFlip'-only name can be uploaded

The combined name 'ReFlip — Depop ⇄ Vinted cross-lister' shipped as
v1.0.1 and is the currently-published/live version. The later change to
the pure 'ReFlip' name kept version 1.0.1, which can't be re-uploaded
over an already-published version - so that name change never reached
the store. Bumped to 1.0.2 so the ReFlip-only package can be uploaded.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>