Update maximum gas to 180k

[AncientHodler-Demiurg]

If Chainnweb allows a maximum of 180k gas for transactions, it makes absolutely no sense to enforce 150k as standard. My complex modules, are created with 180k gas limit in mind, and i had tremendous problems testing them on devnet and test -net. As a matter of fact i cannot even testthem on devnet and testnet because of this default limit of 150k, and the only way for me actualy test-them is to personally run a node with 180k limit, and additionaly ask for a pool operator to raise his mining limit to 180k on his mining node.

In this manner, i will end up using mainnet, as a testnet, by deploying a testnamespace, and testing my modules on mainnet. What do we have testnets for, if i cant even use the testnet for the very reason it is existing, namely to do testing, when my only option is to use the mainnet for testing ?!

Therefore i ask to raise the default limit from 150k gas to 180k gas !