As @lukewakeford pointed out in https://github.com/Moya/Moya/commit/3206a0f4bd770befa6dcaa9463e9b308f749ca76#r81024749
our rocket integration for hiding dev dependencies
(https://github.com/shibapm/Rocket#hide-dev-dependencies) was
producing a malformed Package.swift for releases. this should fix the
issue by instructing Rocket to comment out the entire testTarget,
instead of just the `name:` line