v2.18.0

What is New:
• Added support multi-select drop-down as a new field type in form messages
• Added support for firebase messaging v23.0.8, play-services-base v18.1.0 version and location v20.0.0
• Added support for HMS version v6.5.0.300

Enhancements and Improvements:
• Removed duplicate values from the input array for the set message status method
• Various internal improvements and enhancements