Webworkers panic if serialisation fails

[gilescope]

One bad reply kills webapp

gloo/crates/worker/src/codec.rs

Line 36 in b8f969f

bincode::deserialize(&data).expect("can't deserialize an worker message")

will panic if a message is sent across with contents that are not deserialisable. There's some requests that bincode can't handle ( DeserializeAnyNotSupported ) - Ideally this should be a regular error rather than a panic as it should be up to the library user to decide if this situation is terminal or not (one bad message may not be the end of the world).