Update dependency grunt to v1.3.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
grunt (source)	devDependencies	minor	1.2.1 -> 1.3.0

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Release Notes

gruntjs/grunt

### [`v1.3.0`](https://togithub.com/gruntjs/grunt/releases/v1.3.0) [Compare Source](https://togithub.com/gruntjs/grunt/compare/v1.2.1...v1.3.0) - Merge pull request [#​1720](https://togithub.com/gruntjs/grunt/issues/1720) from gruntjs/update-changelog-deps [`faab6be`](https://togithub.com/gruntjs/grunt/commit/faab6be) - Update Changelog and legacy-util dependency [`520fedb`](https://togithub.com/gruntjs/grunt/commit/520fedb) - Merge pull request [#​1719](https://togithub.com/gruntjs/grunt/issues/1719) from gruntjs/yaml-refactor [`7e669ac`](https://togithub.com/gruntjs/grunt/commit/7e669ac) - Switch to use `safeLoad` for loading YML files via `file.readYAML`. [`e350cea`](https://togithub.com/gruntjs/grunt/commit/e350cea) - Merge pull request [#​1718](https://togithub.com/gruntjs/grunt/issues/1718) from gruntjs/legacy-log-bumo [`7125f49`](https://togithub.com/gruntjs/grunt/commit/7125f49) - Bump legacy-log [`00d5907`](https://togithub.com/gruntjs/grunt/commit/00d5907)

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