v1.0.3

Update Labracore OpenAPI spec to v1.0.3

See merge request !11

Add explicit implementation dep. for reactor

See merge request !10

We noticed IntelliJ was giving strange errors in CPM2.0 when not having
the webflux or reactor dependency. The cause of this was most probably
that the reactor dependency was not transitively available through
webflux.

This commit adds the reactor dependency explicitely in the hope that it
is transferred correctly to projects using Labradoor as a dependency.