Bump java version from 8 to 11 (#343)

Consumes the rc from metafacture-core which also uses java 11.
See #515 .

Author: dr0i

build.gradle

@@ -45,7 +45,7 @@ subprojects {
       'jquery':         '3.3.1-1',
       'junit_jupiter':  '5.8.2',
       'junit_platform': '1.4.2',
-      'metafacture':    '5.7.0',
+      'metafacture':    '6.0.0-rc1-SNAPSHOT',
       'mockito':        '2.27.0',
       'requirejs':      '2.3.6',
       'slf4j':          '1.7.21',
@@ -55,7 +55,7 @@ subprojects {
   }
 
   group = 'org.metafacture'
-  version = '0.8.0-SNAPSHOT'
+  version = '1.0.0-SNAPSHOT'
 
   apply plugin: 'checkstyle'
   apply plugin: 'eclipse'