docs: update readme (#47)

feat: ab (#44)

fix: the configuration file cannot be found in the IDE plugin (#42)

feat: support map type variables in user event and item event (#41)

feat: support map type variables in user event and item event (#41)

feat: XEI (#40)

feat: set preset event properties (#39)

fix:checkstyle (#36)

fix: test (#34)

fix: mvn test error (#32)