Update nock to version 5.2.1 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

nock just published its new version 5.2.1, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of nock – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 23 commits .

• 725fdc6 changelog update
• 412cfe1 v5.2.1
• 979cc39 browserify bundle update
• 510e31c emitting error on request abort. fixes #439
• a131ff7 changelog update
• a0ac792 v5.2.0
• 8b55243 scope now exposes interceptors
• e6b9635 v5.1.0
• 28f6b29 abort behaves. somehow addresses #439
• beb9bc6 v5.0.0
• 1709e5d Merge branch 'xavierchow-master'
• 10225cb browserify bundle update
• 19c11bd Merge branch 'master' of git://github.com/xavierchow/nock into xavierchow-master
• eddb2b9 Upgrade to lodash 3.0, fix #423
• b0cff56 v4.1.0

There are 23 commits in total. See the full diff.

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