Add evm_mine to Keepers tests

[colinsteidtmann]

I think you should add the line await network.provider.send("evm_mine"); below evm_increaseTime, on the typescript keepers test file.

Or at least that's what I had to do on my local file to make the time increase have any real effect.

Reference: https://ethereum.stackexchange.com/questions/86633/time-dependent-tests-with-hardhat

[PatrickAlphaC]

Ohhhh!! Yes! Great issue. Labeled as good first issue.

[adityabhattad2021]

Is this still open? (I sent a PR)