Reduce warnings during sample project installation

[fvictorio]

Most warnings come from third-party plugins (solidity-coverage and gas-reporter). If we update some dependencies in those repos, the warnings will go away.

According to @alcuadrado, this is what we need to do:

soldity-coverage > detect-port (Upgrade / Vendor as its tiny and pulls deps)
solidity-coverage > @truffle/provider (Replace)
hardhat-gas-reporter > eth-gas-reporter > mocha (Upgrade)
hardhat-gas-reporter > eth-gas-reporter > request-promise-native (Replace)
hardhat-gas-reporter > eth-gas-reporter > request (Replace)

TODO:

eth-gas-reporter package:

• bump ethers version: Bump ethers version cgewecke/eth-gas-reporter#296
• request: it seems that the request package is not used, it should be removed: Remove unused request package cgewecke/eth-gas-reporter#297
• request-promise-native: Replace deprecated package request-promise-native cgewecke/eth-gas-reporter#298

solidity-coverage:

• update mocha version: Update mocha version to fix deprecated debug package sc-forks/solidity-coverage#810

After these changes the packages with the newer and correct versions should be automatically downloaded during the installation.

[ChristopherDedominici]

External PRs have been merged and the warnings are no longer appearing during the sample project installation.