widened version range for asm to include version 6 https://github.com/eclipse/xtext-core/issues/501
widened version range for asm to include version 6 https://github.com/eclipse/xtext-core/issues/501

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

miklossy/xtext-core,miklossy/xtext-core