Add some issue & label endpoints

[GriffinCodes]

• Add some issue & label endpoints
• Support multiple issue assignees
• Serialize users and labels correctly

Just some work I did for my discord bot

Some questions:

• I added the Label & User serializers, but if someone ever wants to create/update one of those objects, it will use that serializer and not send the proper payload. Should all fields of that type be annotated with @JsonSerializer(using = <Type>Serializer.class), or is there another way I should be doing it?
• The use of Optional vs @Nullable seems to be arbitrary; is there a pattern I'm not seeing?

Feedback welcome

Closes #62

[barbatron]

Just a note on the assignee/assignees . I don't feel strongly about it but am wary of breaking changes. PTAL @GriffinCodes

[GriffinCodes]

Just a note on the assignee/assignees . I don't feel strongly about it but am wary of breaking changes. PTAL @GriffinCodes

Great idea, made the change and it behaves correctly. Still learning all the features Jackson :)

[GriffinCodes]

Apologies for the force push, I removed the commit that changed the version in the pom.xml

[barbatron]

This serializer seems like it could be replaced by Jackson annotations too - thoughts?

[barbatron]

This serializer seems like it could be replaced by Jackson annotations too - thoughts?

[ebk45]

Hi @GriffinCodes.

We apologise for taking so long to get eyes on this PR, we haven't been able to maintain this library to the standard we would have liked to but this will be changing in the new year. If you could please get this rebased and we'll be prioritising all open PRs ready for review.

Thanks!

Ellie

[ebk45]

Hello,

As this PR is now stale and we've not had any new activity on it, we've decided to close it so we can keep track of active/more recent changes. We will leave the branch untouched in case you would like to reopen and rebase.

Thanks!

Ellie