Bump frontend-maven-plugin from 1.4 to 1.9.1#59

dependabot-preview[bot] wants to merge 1 commit intoChineseVersionReactivePlatform/Spring-In-Action-5:ChineseVersionfrom

dependabot/maven/com.github.eirslett-frontend-maven-plugin-1.9.1ReactivePlatform/Spring-In-Action-5:dependabot/maven/com.github.eirslett-frontend-maven-plugin-1.9.1Copy head branch name to clipboard