chore(deps): update dependency cz-conventional-changelog to ^2.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
cz-conventional-changelog	devDependencies	minor	^2.1.0	source

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Release Notes

commitizen/cz-conventional-changelog

### [`v2.1.0`](https://togithub.com/commitizen/cz-conventional-changelog/releases/v2.1.0) [Compare Source](https://togithub.com/commitizen/cz-conventional-changelog/compare/v2.0.0...v2.1.0) <a name"2.1.0"> ##### 2.1.0 (2017-10-27) ##### Features - **prompt:** add confirmation fields + edit for clarity ([#​58](https://togithub.com/commitizen/cz-conventional-changelog/issues/58)) ([d40ac2c5](https://togithub.com/commitizen/cz-conventional-changelog/commit/d40ac2c5))

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[codecov-io]

Codecov Report

Merging #575 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #575   +/-   ##
=======================================
  Coverage   83.09%   83.09%           
=======================================
  Files          15       15           
  Lines        2058     2058           
  Branches      423      423           
=======================================
  Hits         1710     1710           
  Misses        346      346           
  Partials        2        2

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