Use camelCase JSON tokens for Worker projects

[stijnmoreels]

Is your feature request related to a problem? Please describe.
The web API project template uses lower-case JSON tokens by-default, but the Worker projects do not.

Describe the solution you'd like
We should be consistent and make sure that these Worker projects also uses lower-case during JSON serialization/deserialization.

[fgheysels]

lowercase or camelCase ?

[stijnmoreels]

lowercase or camelCase ?

Ah, yes, my bad 😅 , was distracted with lower-case URL's.
It's camelCase, indeed.