chore(deps-dev): bump standard-version from 5.0.2 to 8.0.1

Bumps [standard-version](https://github.com/conventional-changelog/standard-version) from 5.0.2 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](https://github.com/conventional-changelog/standard-version/compare/v5.0.2...v8.0.1)

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

package.json

@@ -59,7 +59,7 @@
     "@types/yargs": "^11.1.1",
     "husky": "^0.14.3",
     "rimraf": "^2.6.2",
-    "standard-version": "^5.0.2",
+    "standard-version": "^8.0.1",
     "tslint": "^5.11.0",
     "tslint-consistent-codestyle": "^1.13.3",
     "typescript": "^3.0.1"