Release predicate v0.2

[bdehamer]

Closes #492

Bumps the release predicate from v0.1 to v0.2 in order to rename the releaseId predicate field to packageId.

Rendered version

[marcelamelara]

Thank you @bdehamer ! The spec changes LGTM, but can you please also update the corresponding .proto file under protos/ ? No need to regenerate the language bindings, since that's handled by the CI.

[bdehamer]

@marcelamelara I noticed that the previous release proto was in release/v0 (and use similarly named v0 package names in the proto def itself). I'm assuming that we do NOT want to just update the proto in-place, so i added a new release/v0.2 directory.

Lemme know if this is not the correct approach.

[marcelamelara]

@bdehamer Thanks for adding that. Yes, given that this isn't a backwards compatible change, creating a separate v0.2 directory. Does it make sense to rename the current release/v0 directory to release/v0.1? We did this for another predicate when we had a similar situation, but I don't know how many implementations depend on the current directory.

[bdehamer]

Updated!

[marcelamelara]

Thanks so much @bdehamer !