Release v3.0.0

• [fix] remove tax when no tax
• [fix] return if not address
• Fix floating method call
• Improve state validation for addresses
• Upper-case state for PyCountry
• Remove tabs/newlines
• Fix argument state
• Add validations
• Reworked and refactored api.py code to handle addresses from all countries
• Rename hook
• Move Quotation validation call from TaxJar to AWC
• [Fix] Error message for wrong state code
• Replace GMaps dependency with PyCountry