v1.15.1

Bug Fixes

• vtex: merge headers Headers-aware so init.headers Cookie survives (#53)

Funnel all per-call header merges through a mergeHeaders helper backed by the Headers constructor, which correctly absorbs every HeadersInit shape (Headers / string[][] / Record). Same treatment applied to vtexCachedFetch and intelligentSearch so their _fetch callsites get vtex_segment forwarding too — covering the last gaps that previously forced sites to wrap setVtexFetch with their own (often Headers-unsafe) cookie injectors.

Published manually due to CI publish-token issue; the artifact on npm is the same one CI built and verified.