feat: add invoice payment

Merge pull request #9 from truehostcloud/dev

Fix/ Get AutoLogin Links

Merge pull request #8 from truehostcloud/manage_domain_ns

retrieve and update domain nameservers

Merge pull request #7 from truehostcloud/purchase_multiple_products

Purchase multiple products

Merge pull request #6 from truehostcloud/update_client_new_parameters

fix:update client new  parameters

chore (order parameters): Add support for other parameters as declare…

…d in the official whmcs documentation