As a plugin developer you can use this plugin as dependency of your plugin by adding a dependency tag to your POM.
To add the latest version of this plugin as a maven dependency, use the following:
<dependency>
<groupId>com.amadeus.jenkins.plugins</groupId>
<artifactId>workflow-cps-global-lib-http</artifactId>
<version>2.54.0</version>
</dependency>