L2 Support!

Adds support for L2 domains on Polygon chain
Added Locations method to retrieve location info of domains

Add Namehash method

Add Namehash method for UNS and ZNS which returns a namehash of a domain following the EIP-137 standard

UNS support

• Add UNS support
• Replaces resolution.NewCnsBuilder() with resolution.NewUnsBuilder()
• Add UNS testnet support with UnsBuilder.SetEthereumNetwork() method
• Add Unhash method
• Add TokenURIMetadata getter
• isSupportedDomain() now makes network call

resolution-go is live!

Initial release