Update strip-ansi to the latest version 🚀

The devDependency strip-ansi was updated from `4.0.0` to `6.0.0`.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

Publisher: sindresorhus License: MIT

Release Notes for v6.0.0

Breaking

Require Node.js 8 976f459

Breaking for TypeScript users

Only use a CommonJS export for the TypeScript definition
You need to change import stripAnsi from 'strip-ansi'; to import stripAnsi = require('strip-ansi');

v5.2.0...v6.0.0

Commits

The new version differs by 15 commits.

59533da 6.0.0
976f459 Require Node.js 8
57878e2 Tidelift tasks
a022f23 Tidelift tasks
b9c4929 5.2.0
81cd3cc Meta tweaks
89dc7f6 Add TypeScript definition (#28)
5cb7e20 Fix readme (#27)
581fd4e 5.1.0
41b0a8b Add support for terminal link (#26)
841f0c4 Add security section
dfab677 5.0.0
6a25566 Require Node.js 6 and upgrade dependencies
e8d149c Add Tidelift mention in the readme
52dcf65 Add related streaming version of this module to the readme (#15)

See the full diff

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