Bump eslint from 6.8.0 to 7.0.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.8.0 to 7.0.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.8.0...v7.0.0)

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

package.json

@@ -21,7 +21,7 @@
     "auto-changelog": "^2.0.0",
     "babel-preset-gatsby-package": "^0.4.1",
     "cross-env": "^7.0.2",
-    "eslint": "^6.8.0",
+    "eslint": "^7.0.0",
     "eslint-config-prettier": "^6.10.1",
     "eslint-plugin-prettier": "^3.1.2",
     "jest": "^26.0.1",