PIP-35 MinGas Increase

Proposing to change this PIP to lower MinGas from 30 to 25

txpool, eth, and miner modules changed to be:

  • txpool.pricelimit: Minimum gas price limit to enforce the acceptance of txs into the pool (default: 25000000000)
  • miner.gasprice: Minimum gas price for mining a transaction (default: 25000000000)
  • gpo.ignoreprice: Gas price below which gpo will ignore transactions (default: 25000000000)