Update gridsome requirement from ^0.6.4 to ^0.7.0 Updates the requirements on [gridsome](https://github.com/gridsome/gridsome) to permit the latest version. - [Release notes](https://github.com/gridsome/gridsome/releases) - [Changelog](https://github.com/gridsome/gridsome/blob/master/CHANGELOG.md) - [Commits](https://github.com/gridsome/gridsome/compare/gridsome@0.6.4...gridsome@0.7.0) Signed-off-by: dependabot-preview[bot]