Fixing install dependency problem

[Muritavo]

Hi there,

When installing this project, there was a problem with a dependency that could not be found. See #34

By just updating the dependency to graph-cli, it seems to fix the problem. I was able to execute the install and was able to deploy graphs to the hardhat node at another library I develop https://github.com/Muritavo/testing-toolkit/blob/main/test/blockchain.test.ts I also added a hardhat.config.js for testing if the hardhat node can be run with the plugin.