Question about dependecy

[f3d0ss]

Why do you import those dependency:
https://github.com/paulrberg/solidity-template/blob/315cf7a478e8bf149a13a4d42a4d81038d3495b2/package.json#L13-L17
When you have this one:
https://github.com/paulrberg/solidity-template/blob/315cf7a478e8bf149a13a4d42a4d81038d3495b2/package.json#L36
Shouldn't those be already included?
I'm asking because I'm kind of new to those things

[PaulRBerg]

The umbrella package ethers is needed because it's a peer dependency of many other packages, e.g. @nomiclabs/hardhat-ethers.