v2.0.0-beta.1

Changes:

• 5d6defb Upate version api call (#2899)
• c2153fa Add version endpoint to node API, rename pool/push (#2897)
• e15cffb Modify mine_block to use wallet V2 API (#2892)
• e3f3064 Support new Bulletproof rewind scheme (#2848)
• 6429580 PoW HardFork (#2866)
• 7a8a52e update grin.yml version
• f9c18a4 fix humansize version
• 75c229b create 2.0.0 branch

This list of changes was auto generated.