v1.0.7: Merge pull request #3 from VhiktorBrown/fixes/upgrade-to-sdk-34

• MetaData Error: Issue with library not allowing metadata to be optional has been fixed. You can now easily exclude metadata without experiencing issues.
• Upgraded Library: The library has been upgraded to support Android SDK 34. This ensures compatibility with the latest Android devices and features.
• Payload Optimization: Unnecessary details in the payload sent to Paystack have been removed. This improves efficiency and reduces data transmission size.
• Email Validation: A check for email has been added to ensure an email address is provided before sending a request to Paystack. This helps prevent errors and ensures proper communication with the user.