Update MiMa and Fix binary incompatibilities

[jlprat]

MiMa doesn't have entries for releases 10.0.2 and 10.0.3 this implies that all PR's since then were not properly checked by MiMa, causing some binary incompatibilities.
Currently these are:

• akka-http-spray-json:
  • method sprayJsValueByteStringUnmarshaller()akka.http.scaladsl.unmarshalling.Unmarshaller in trait akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport is present only in current version filter with: ProblemFilters.exclude[ReversedMissingMethodProblem]("akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport.sprayJsValueByteStringUnmarshaller")
• akka-http:
  • method fromEntityStreamingSupportAndEntityMarshaller(akka.http.scaladsl.common.EntityStreamingSupport,akka.http.scaladsl.marshalling.Marshaller,scala.reflect.ClassTag)akka.http.scaladsl.marshalling.Marshaller in trait akka.http.scaladsl.marshalling.LowPriorityToResponseMarshallerImplicits is present only in current version filter with: ProblemFilters.exclude[ReversedMissingMethodProblem]("akka.http.scaladsl.marshalling.LowPriorityToResponseMarshallerImplicits.fromEntityStreamingSupportAndEntityMarshaller")
  • method andThen(akka.http.scaladsl.unmarshalling.Unmarshaller)akka.http.scaladsl.unmarshalling.Unmarshaller in trait akka.http.scaladsl.unmarshalling.Unmarshaller is present only in current version filter with: ProblemFilters.exclude[ReversedMissingMethodProblem]("akka.http.scaladsl.unmarshalling.Unmarshaller.andThen")
• akka-http-core:
  • method parsingRendering(akka.http.scaladsl.settings.ServerSettings,akka.event.LoggingAdapter)akka.stream.scaladsl.BidiFlow in object akka.http.impl.engine.server.HttpServerBluePrint does not have a correspondent in current version filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("akka.http.impl.engine.server.HttpServerBluePrint.parsingRendering")
  • method apply(akka.http.scaladsl.settings.ServerSettings,akka.event.LoggingAdapter)akka.stream.scaladsl.BidiFlow in object akka.http.impl.engine.server.HttpServerBluePrint does not have a correspondent in current version filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("akka.http.impl.engine.server.HttpServerBluePrint.apply")
  • method parsing(akka.http.scaladsl.settings.ServerSettings,akka.event.LoggingAdapter)akka.stream.scaladsl.Flow in object akka.http.impl.engine.server.HttpServerBluePrint does not have a correspondent in current version filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("akka.http.impl.engine.server.HttpServerBluePrint.parsing")

I guess the proper 10.0.*.backwards.excludes files must be added for those projects

[jlprat]

After putting the right .backwards.excludes files in place these are the current binary incompats:
akka-http-core: found 2 potential binary incompatibilities while checking against com.typesafe.akka:akka-http-core_2.11:10.0.3 (filtered 7)

• class akka.http.impl.util.StreamUtils#AbsorbCancellationStage does not have a correspondent in current version filter with: ProblemFilters.exclude[MissingClassProblem]("akka.http.impl.util.StreamUtils$AbsorbCancellationStage")
• method absorbCancellation()akka.stream.scaladsl.Flow in object akka.http.impl.util.StreamUtils does not have a correspondent in current version filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("akka.http.impl.util.StreamUtils.absorbCancellation")

[jrudolph]

Fixed by #871.