@truffle/from-hardhat is missing integration tests

Issue

Currently, this package is experimental, but we are rapidly approaching a time when that is no longer the case.

Steps to Reproduce

Look around this repo.

Expected Behavior

Find integration tests for @truffle/from-hardhat

Actual Results

There are no integration tests for @truffle/from-hardhat

Environment

• Operating System:
• Ethereum client:
• Truffle version (truffle version): v5.7.8
• node version (node --version):
• npm version (npm --version):