Missing @Nullable in bridge for brave Baggage implementation

[rgarciapariente]

Hello,

With version micrometer-tracing-bridge-brave:1.2.x you could do baggage.makeCurrent(null) to remove a baggage value but with micrometer-tracing-bridge-brave:1.3.x, all API are @NotNull by default.

Maybe, it is possible to add @Nullable to makeCurrent and set methods in class io.micrometer.tracing.brave.bridge.BraveBaggageInScope to avoid issues with nullabilities check?

Many thanks & regards

[shakuzen]

Thanks for the report. It looks like that was done in #545. Probably we should have been more careful to note which API should accept nullable values.