Warning re: `ContextPart` when loading `Seaside-Squeak-Continuation` in Squeak6.0beta

[tcj]

Related to retirement of BlockContext family in Squeak 6.0.

This package depends on the following classes:
  ContextPart
You must resolve these dependencies before you will be able to load these definitions: 
  ContextPart>>localAt:
  ContextPart>>localAt:put:
  ContextPart>>localSize
  ContextPart>>serialiseOn:

Will this require some re-implementation of continuations for Squeak 6.0? 😬 & then some adjustments to BaselineOf spec for Squeak 6.0...

[theseion]

Seaside has been working in Pharo without BlockContext and ContextPart for a while already. Updating Squeak shouldn't be a huge issue.