Bump picocli from 3.8.2 to 4.4.0

Bumps [picocli](https://github.com/remkop/picocli) from 3.8.2 to 4.4.0.
- [Release notes](https://github.com/remkop/picocli/releases)
- [Changelog](https://github.com/remkop/picocli/blob/master/RELEASE-NOTES.md)
- [Commits](remkop/picocli@v3.8.2...v4.4.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

build.gradle

@@ -175,7 +175,7 @@ subprojects { project ->
     dependencies {
         documentation "org.fusesource.jansi:jansi:$jansiVersion"
         documentation "org.codehaus.groovy:groovy-dateutil:$groovyVersion"
-        documentation 'info.picocli:picocli:3.8.2'
+        documentation 'info.picocli:picocli:4.4.0'
 
         testCompile "org.codehaus.groovy:groovy-test:$groovyVersion"
         testCompile "org.spockframework:spock-core:$spockVersion", {