Bump gatsby-plugin-nprogress from 2.8.0 to 2.9.0

Bumps [gatsby-plugin-nprogress](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-nprogress) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-nprogress/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-nprogress@2.9.0/packages/gatsby-plugin-nprogress)

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

package.json

@@ -110,7 +110,7 @@
     "eslint-plugin-react": "^7.22.0",
     "eslint-plugin-standard": "^5.0.0",
     "gatsby": "^2.30.1",
-    "gatsby-plugin-nprogress": "^2.7.0",
+    "gatsby-plugin-nprogress": "^2.9.0",
     "gatsby-source-custom-api": "^2.1.4",
     "husky": "^4.3.6",
     "identity-obj-proxy": "^3.0.0",