chore(deps-dev): bump standard-version from 6.0.1 to 8.0.1

Bumps [standard-version](https://github.com/conventional-changelog/standard-version) from 6.0.1 to 8.0.1.
- [Release notes](https://github.com/conventional-changelog/standard-version/releases)
- [Changelog](https://github.com/conventional-changelog/standard-version/blob/master/CHANGELOG.md)
- [Commits](conventional-changelog/standard-version@v6.0.1...v8.0.1)

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

Author: dependabot[bot]

package.json

@@ -73,7 +73,7 @@
     "husky": "^1.3.1",
     "lint-staged": "^8.1.5",
     "prettier": "1.17.1",
-    "standard-version": "^6.0.1",
+    "standard-version": "^8.0.1",
     "styled-components": "^4.3.2"
   },
   "gitHead": "09e9e49851d148013d5162c46f3de2c73e204592",