The old Stream has been renamed to DuplexResourceStream to complement the ReadableResourceStream and WritableResourceStream introduced via #83 and #84.
Note that the DuplexResourceStream now rejects read-only or write-only streams, so this may affect BC. If you want a read-only or write-only resource, use ReadableResourceStream or WritableResourceStream instead of DuplexResourceStream.
Also marking this as a bug fix because the old behavior with regards to stream resource that were not opened in duplex mode could actually result in runtime errors.
The Stream class is one of the main classes in this package, so I've added a deprecated dummy Stream class that simply extends the new DuplexResourceStream for BC reasons only. This means that existing packages can keep using the Stream class for "normal" resources such as TCP/IP connections with this version. This class exists to ease upgrading only and will be removed in the next version.
If you want to review, consider looking at the individual commits, this should make this slightly more obvious.