Export MimeType's swap() and stream output.
Export MimeType's swap() and stream output.

Those may be required when using MimeType outside of Core.

Signed-off-by: Daniel Maleike <e6fb06210fafc02fd7479ddbed2d042cc3a5155e@maleike.de>

fmilano/mitk,fmilano/mitk,MITK/MITK,MITK/MITK,MITK/MITK,fmilano/mitk,fmilano/mitk,MITK/MITK,MITK/MITK,fmilano/mitk,fmilano/mitk,MITK/MITK,fmilano/mitk