[#912] export org.eclipse.xtext.ide.server.semanticHighlight as internal api
[#912] export org.eclipse.xtext.ide.server.semanticHighlight as internal api

Signed-off-by: Christian Dietrich <667c88ac3556c8ac174202176ae9c5b02bafe1e7@itemis.de>

miklossy/xtext-core,miklossy/xtext-core