increased maven/gradle asm version to 6.0 https://github.com/eclipse/xtext-extras/issues/208
increased maven/gradle asm version to 6.0 https://github.com/eclipse/xtext-extras/issues/208

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

miklossy/xtext-core,miklossy/xtext-core