Update dependency grunt to v1.0.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
grunt (source)	devDependencies	patch	1.0.3 -> 1.0.4

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Release Notes

gruntjs/grunt

### [`v1.0.4`](https://togithub.com/gruntjs/grunt/compare/v1.0.3...v1.0.4) [Compare Source](https://togithub.com/gruntjs/grunt/compare/v1.0.3...v1.0.4)

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