Updating package diagram
Updating package diagram

Created with: 
```graph TD
  vm{VM}
  common --> blockchain
  common --> block
  common --> vm
  common --> tx
  ethash --> blockchain
  block --> blockchain
  blockchain --> vm
  block --> vm
  tx --> vm
  tx --> block
  account --> vm```
ethereumjs/ethereumjs-vm,ethereum/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm