Update dependency cz-conventional-changelog to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
cz-conventional-changelog	devDependencies	major	2.1.0 -> 3.0.2

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Release Notes

commitizen/cz-conventional-changelog

### [`v3.0.2`](https://togithub.com/commitizen/cz-conventional-changelog/releases/v3.0.2) [Compare Source](https://togithub.com/commitizen/cz-conventional-changelog/compare/v3.0.1...v3.0.2) ##### Bug Fixes - **config-loader:** captured the direct dependency on commitizen for the use of the config loader ([#​90](https://togithub.com/commitizen/cz-conventional-changelog/issues/90)) ([4b23bbc](https://togithub.com/commitizen/cz-conventional-changelog/commit/4b23bbc)), closes [#​89](https://togithub.com/commitizen/cz-conventional-changelog/issues/89) ### [`v3.0.1`](https://togithub.com/commitizen/cz-conventional-changelog/releases/v3.0.1) [Compare Source](https://togithub.com/commitizen/cz-conventional-changelog/compare/v3.0.0...v3.0.1) ##### Bug Fixes - update longest to ^2 ([#​88](https://togithub.com/commitizen/cz-conventional-changelog/issues/88)) ([7234529](https://togithub.com/commitizen/cz-conventional-changelog/commit/7234529)) ### [`v3.0.0`](https://togithub.com/commitizen/cz-conventional-changelog/releases/v3.0.0) [Compare Source](https://togithub.com/commitizen/cz-conventional-changelog/compare/v2.1.0...v3.0.0) ##### Bug Fixes - remove pre-node 10 support ([#​86](https://togithub.com/commitizen/cz-conventional-changelog/issues/86)) ([76588ad](https://togithub.com/commitizen/cz-conventional-changelog/commit/76588ad)) ##### Features - add default values to options ([#​69](https://togithub.com/commitizen/cz-conventional-changelog/issues/69)) ([65d6a9f](https://togithub.com/commitizen/cz-conventional-changelog/commit/65d6a9f)) - implement configuration through package.json ([#​75](https://togithub.com/commitizen/cz-conventional-changelog/issues/75)) ([3398c02](https://togithub.com/commitizen/cz-conventional-changelog/commit/3398c02)) ##### BREAKING CHANGES - Node 10 is LTS so please upgrade to it.

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