'org.webjars.npm:clean-css:3.4.8'
<dependency>
<groupId>org.webjars.npm</groupId>
<artifactId>clean-css</artifactId>
<version>3.4.8</version>
</dependency>
<dependency org="org.webjars.npm" name="clean-css" rev="3.4.8"/>
"org.webjars.npm", "clean-css", "3.4.8"