chore(deps): update dependency grunt-contrib-cssmin to v2 - autoclosed

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
grunt-contrib-cssmin	devDependencies	major	~0.14.0 -> ~2.2.0

By merging this PR, the below vulnerabilities will be automatically resolved:

	Severity	CVSS Score	CVE
	Medium	5.3	WS-2019-0017

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Release Notes

gruntjs/grunt-contrib-cssmin

### [`v2.2.0`](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v2.1.0...v2.2.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v2.1.0...v2.2.0) ### [`v2.1.0`](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v2.0.0...v2.1.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v2.0.0...v2.1.0) ### [`v2.0.0`](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v1.0.2...v2.0.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v1.0.2...v2.0.0) ### [`v1.0.2`](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v1.0.1...v1.0.2) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v1.0.1...v1.0.2) ### [`v1.0.1`](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v1.0.0...v1.0.1) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v1.0.0...v1.0.1) ### [`v1.0.0`](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v0.14.0...v1.0.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-cssmin/compare/v0.14.0...v1.0.0)

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