Jest, console.warn require.cache modification is not permitted

Due to this:
https://github.com/facebook/jest/pull/9841/files
and this:

Lines 21 to 23 in 410cc14

    
           // Prevent caching of this module so module.parent is always accurate 
        
           delete require.cache[__filename]; 
        
           const parentDir = path.dirname((module.parent && module.parent.filename) || '.');

=>

console.warn
    `require.cache` modification is not permitted

(output'ed many times in the console when unit-testing, with full stacktrace, so quite disruptive, albeit non-fatal unless unit-tests check for CLI output)

Fixed in v11: https://github.com/sindresorhus/conf/releases/tag/v11.0.0

	// Prevent caching of this module so module.parent is always accurate
	delete require.cache[__filename];
	const parentDir = path.dirname((module.parent && module.parent.filename) \|\| '.');