Expose setTime to API

[danielyaa5]

I was having difficulty reseting time back to original time for my unit tests after making the evm_increaseTime call to change the time. I saw the setTime function wasn't exposed and was so easy to expose that I decided to make a PR before even getting feedback.

[axic]

I'd suggest to use the same API as cpp-ethereum (see ethereum/interfaces#4). Perhaps call it evm_modifyTimestamp if it is kept under the evm namespace.

[bashalex]

@axic I'd like to open another PR with this functionality. This method would be very useful for unit tests.
Do you want evm_modifyTimestamp to exist along with evm_increaseTime or replace it?

[jakub-wojciechowski]

Hi @danielyaa5, @axic, @bashalex,
I totally agree that we need such a feature.

I've just pushed a PR to ganache-core with a proposal of an atomic evm_mineAtTimestamp api function. Let me know if you have any comments.

[benjamincburns]

Closing this one, as the logic has moved to ganache-core, as discussed above.