There are clearly breaking changes in 5.4 -> 5.5 upgrade path. Composer versions are generally ought to use Semver, meaning this should not have been a minor version bump, but a major version bump. One can not safely upgrade to a newer version within the 5.x range without breaking changes.
There are clearly breaking changes in 5.4 -> 5.5 upgrade path. Composer versions are generally ought to use Semver, meaning this should not have been a minor version bump, but a major version bump. One can not safely upgrade to a newer version within the 5.x range without breaking changes.