Upgrade AssertJ dependency to version 3.27.7. (#426)

Author: blackwinter

build.gradle

@@ -29,7 +29,7 @@ subprojects {
     versions = [
       'ace':              '1.3.3',
       'antlr':            '3.5.2',
-      'assertj':          '3.11.1',
+      'assertj':          '3.27.7',
       'commons_compress': '1.21',
       'commons_io':       '2.21.0',
       'dbcp':             '1.4',