fix(deps): bump gatsby-plugin-typescript from 2.6.0 to 2.7.0

Bumps [gatsby-plugin-typescript](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-typescript) from 2.6.0 to 2.7.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-typescript/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-typescript@2.7.0/packages/gatsby-plugin-typescript)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

gatsby-theme-atom-service/package.json

@@ -60,7 +60,7 @@
     "gatsby-plugin-lodash": "^3.5.0",
     "gatsby-plugin-material-ui": "^2.1.10",
     "gatsby-plugin-react-helmet": "^3.5.0",
-    "gatsby-plugin-typescript": "^2.6.0",
+    "gatsby-plugin-typescript": "^2.7.0",
     "gatsby-source-filesystem": "^2.6.0",
     "gatsby-transformer-yaml": "^2.5.0",
     "lodash": "^4.17.20",