Update dependency documentation to v12

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
documentation	devDependencies	major	10.1.0 -> 12.0.1

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Release Notes

documentationjs/documentation

### [`v12.0.1`](https://togithub.com/documentationjs/documentation/blob/master/CHANGELOG.md#​1201httpsgithubcomdocumentationjsdocumentationcomparev1200v1201-2019-07-10) [Compare Source](https://togithub.com/documentationjs/documentation/compare/v12.0.0...v12.0.1) ##### Bug Fixes - Crash when called with no inputs. yargs now variadic positional arguments undefined instead of []([821a15e](https://togithub.com/documentationjs/documentation/commit/821a15e)) ### [`v12.0.0`](https://togithub.com/documentationjs/documentation/blob/master/CHANGELOG.md#​1200httpsgithubcomdocumentationjsdocumentationcomparev1101v1200-2019-07-10) [Compare Source](https://togithub.com/documentationjs/documentation/compare/v11.0.1...v12.0.0) - Formatted with Prettier ([8f36e75](https://togithub.com/documentationjs/documentation/commit/8f36e75)) ##### BREAKING CHANGES - The next release will require Node 8 #### [11.0.1](https://togithub.com/documentationjs/documentation/compare/v11.0.0...v11.0.1) (2019-06-12) ##### Bug Fixes - toc with children getting displayed as "note" ([#​1253](https://togithub.com/documentationjs/documentation/issues/1253)) ([14298bb](https://togithub.com/documentationjs/documentation/commit/14298bb)) ### [`v11.0.1`](https://togithub.com/documentationjs/documentation/blob/master/CHANGELOG.md#​1200httpsgithubcomdocumentationjsdocumentationcomparev1101v1200-2019-07-10) [Compare Source](https://togithub.com/documentationjs/documentation/compare/v11.0.0...v11.0.1) - Formatted with Prettier ([8f36e75](https://togithub.com/documentationjs/documentation/commit/8f36e75)) ##### BREAKING CHANGES - The next release will require Node 8 #### [11.0.1](https://togithub.com/documentationjs/documentation/compare/v11.0.0...v11.0.1) (2019-06-12) ##### Bug Fixes - toc with children getting displayed as "note" ([#​1253](https://togithub.com/documentationjs/documentation/issues/1253)) ([14298bb](https://togithub.com/documentationjs/documentation/commit/14298bb)) ### [`v11.0.0`](https://togithub.com/documentationjs/documentation/blob/master/CHANGELOG.md#​1100httpsgithubcomdocumentationjsdocumentationcomparev1010v1100-2019-05-08) [Compare Source](https://togithub.com/documentationjs/documentation/compare/v10.1.0...v11.0.0) ##### Bug Fixes - Fix parsing of optional parameters with annotations ([ca17de5](https://togithub.com/documentationjs/documentation/commit/ca17de5)) ##### Features - Enable all parser plugins ([fa1b0b5](https://togithub.com/documentationjs/documentation/commit/fa1b0b5)) - Support exportNamespaceFrom in parser ([8fa141d](https://togithub.com/documentationjs/documentation/commit/8fa141d)) ##### BREAKING CHANGES - this removes support for legacy decorators, because in one place we had legacy and in another we didn't.

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