fix(installer-test): match Locker content-hash encoding to lock hash

do_test_integration built the Locker's composer.json content string with
serde_json::to_string, which doesn't escape slashes, while the fixture's
auto-computed lock "hash" field used JsonFile::encode_with_options with
slashes escaped (mirroring PHP's json_encode default). Since virtually
every package name contains a "/", this made Locker::isFresh() spuriously
report every such lock as stale, unignoring 12 fixtures that depended on
the lock being recognized as fresh during `install`.

0 files changed, 0 insertions, 0 deletions