We have migrated to a new namespace and updated all package names to dev.despical.commandframework.

• Added #getFirst and #getLast methods to the CommandArguments class.
• Added CompleterHelper#empty method.
• Moved CompleterHelper class to main package and added more detailed javadoc.
• Refactor: migrate all packages to `dev.despical.
• Rename: commandframework.suppressrelocation -> commandframework.suppress.relocation
• Rename: commandframework.suppress_initialization -> commandframework.suppress.initialization

Full Changelog: 1.5.4...1.5.5