BC change introduced between v6.0.3 and v6.0.9

[TristanPouliquen]

Hello,

Just to inform you that you introduced a BC change in a bugfix version.

We switched from v6.0.3 to v6.0.9 as our constraint does not fix the bugfix version, and this resulted in issues in our app.

PostmarkClient::getSuppressions saw its return type change from PostmarkSuppressionRequestList to PostmarkSuppressionList, which internally creates PostmarkSuppression and not PostmarkSuppressionRequestResult anymore.

Type-hinting we had in place failed, and properties of these objects are not the same, even if we only relied on the emailAddress, so changing the type-hint allowed us to easily fix the issue.

Are you following a semver policy or can any release on your end include other BCs?