/**
Clean up error stack traces. Removes the mostly unhelpful internal Node.js entries.
@param stack - The `stack` property of an `Error`.
@example
```
import cleanStack = require('clean-stack');
const error = new Error('Missing unicorn');
console.log(error.stack);
// Error: Missing unicorn
//     at Object.<anonymous> (/Users/sindresorhus/dev/clean-stack/unicorn.js:2:15)
//     at Module._compile (module.js:409:26)
//     at Object.Module._extensions..js (module.js:416:10)
//     at Module.load (module.js:343:32)
//     at Function.Module._load (module.js:300:12)
//     at Function.Module.runMain (module.js:441:10)
//     at startup (node.js:139:18)
console.log(cleanStack(error.stack));
// Error: Missing unicorn
//     at Object.<anonymous> (/Users/sindresorhus/dev/clean-stack/unicorn.js:2:15)
```
*/
export declare const cleanStack: (stack: string, basePath?: string) => string;