Compatibility problem when installing on Magento 2.1.9

[Santiagoebizmarts]

Describe the bug composer.json not allowing installation on Magento 2.1.9

To Reproduce Steps to reproduce the behavior:

1. Run install command: composer require ebizmarts/magento2-mandrill 3.0.14 Expected behavior Installation runs successfully. Actual result Failure with following response: Your requirements could not be resolved to an installable set of packages.

Problem 1 - Conclusion: don't install magento/module-sales 100.2.0-rc20 - Installation request for ebizmarts/magento2-mandrill 3.0.14 -> satisfiable by ebizmarts/magento2-mandrill[3.0.14]. - Conclusion: don't install magento/module-sales 100.1.8|install magento/module-sales 100.2.0-rc20 - Conclusion: remove magento/module-sales 100.1.8|install magento/module-sales 100.2.0-rc20 - ebizmarts/magento2-mandrill 3.0.14 requires magento/module-sales ^100.1.11 -> satisfiable by magento/module-sales[100.2.0-rc20, 100.1.11, 100.1.12, 100.1.13]. - Can only install one of: magento/module-sales[100.1.8, 100.1.11]. - Can only install one of: magento/module-sales[100.1.8, 100.1.12]. - Can only install one of: magento/module-sales[100.1.8, 100.1.13]. - Installation request for magento/module-sales (locked at 100.1.8) -> satisfiable by magento/module-sales[100.1.8].