Pack/unpack implementation, fetch multiple big map values, beacon-sdk update, and more

• Packing/Unpacking data #613
• Use local packData implementation to encode big map keys #667
• Website documentation on how to enable local pack for Big Maps #726
• Support for the new RPC endpoints votes/current_period, votes/successor_period #601
• Taquito API to fetch multiple big maps at once #607
• Added a util function to calculate operation hash #435
• Fix to encode nat and int longer than 1e+21 #637
• Fix to support all comparable types for property value of ticket #686
• Website documentation about Tickets #725
• Return null when an account has no delegate #556
• Build and publish Taquito to npm from pull requests #506
• Add more test coverage for the getBlock endpoint #35
• Update documentation to change 'Thanos' wallet to 'Temple' Wallet #688
• Update Taquito Docs website live code examples to use edonet #566
• Compatibility support for Florencenet (Florencenobanet)
• Updated beacon-sdk to version 2.2.3