React warning when running tests in non-React lib

[benmvp]

🐛 Bug Report

When running npm test within url-lib, I get the following warning:

Warning: React version was set to "detect" in eslint-plugin-react settings, but the "react" package is not installed. Assuming latest React version for linting.

The tests still pass, but the warning clutters the console and is quite confusing seeing as how url-lib doesn't have react at all.

To Reproduce

1. Clone url-lib
2. npm install
3. npm test -- --modes lint

You'll see multiples of the warning messages.

Expected behavior

The warning messages wouldn't show. And technically speaking the plugin really only should be used for React-based libs

Link to repl or repo (highly encouraged)

See above

envinfo

  System:
    OS: macOS Mojave 10.14.6
    CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 2.77 GB / 32.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 12.14.0 - ~/.nvm/versions/node/v12.14.0/bin/node
    Yarn: 1.19.1 - /usr/local/bin/yarn
    npm: 6.13.4 - ~/.nvm/versions/node/v12.14.0/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman