fix: keep the clustered actions inside the lexer instance; this is cleaner and keeps the tests intact as well. `$case_helper` --> `this.simpleCaseActionClusters`
fix: keep the clustered actions inside the lexer instance; this is cleaner and keeps the tests intact as well. `$case_helper` --> `this.simpleCaseActionClusters`

GerHobbelt/jison-lex,GerHobbelt/jison-lex