Update dependency grunt-contrib-clean to v0.7.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
grunt-contrib-clean	devDependencies	minor	0.5.0 -> 0.7.0	source

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Release Notes

gruntjs/grunt-contrib-clean

### [`v0.7.0`](https://togithub.com/gruntjs/grunt-contrib-clean/compare/v0.6.0...v0.7.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-clean/compare/v0.6.0...v0.7.0) ### [`v0.6.0`](https://togithub.com/gruntjs/grunt-contrib-clean/compare/v0.5.0...v0.6.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-clean/compare/v0.5.0...v0.6.0)

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