Upgrade JMH from 1.8 to 1.9
Upgrade JMH from 1.8 to 1.9

jiakuan/commonmark-java,pcj/commonmark-java,vsch/commonmark-java,vsch/commonmark-java,pcj/commonmark-java,jiakuan/commonmark-java,vsch/flexmark-java,pcj/commonmark-java,jiakuan/commonmark-java,atlassian/commonmark-java,marksutt/commonmark-java,atlassian/commonmark-java,marksutt/commonmark-java,vsch/flexmark-java,marksutt/commonmark-java,chiwanpark/commonmark-java,vsch/flexmark-java,commonmark/commonmark-java,vsch/flexmark-java,chiwanpark/commonmark-java,commonmark/commonmark-java,chiwanpark/commonmark-java,vsch/commonmark-java,commonmark/commonmark-java,atlassian/commonmark-java