1.5.1 release

1.5.0 tagging

1.1.2 tagging

Merge pull request pinpoint-apm#941 from koo-taejin/1.1.x

1.1.1 release pinpoint-apm#937

Merge pull request pinpoint-apm#693 from koo-taejin/pinpoint-apm#692

1.1.0 release pinpoint-apm#692

Merge pull request pinpoint-apm#424 from koo-taejin/pinpoint-apm#423

1.0.5 release pinpoint-apm#423

1.0.4 release pinpoint-apm#154

changed version. (1.0.4-SNAPSHOT -> 1.0.4)