Update lint-staged requirement from ^7.3.0 to ^8.0.2

Updates the requirements on [lint-staged](https://github.com/okonet/lint-staged) to permit the latest version.
- [Release notes](https://github.com/okonet/lint-staged/releases)
- [Commits](https://github.com/okonet/lint-staged/commits/v8.0.2)

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

package.json

@@ -141,7 +141,7 @@
     "jest": "^23.6.0",
     "jsdom": "^12.1.0",
     "jsonml.js": "^0.1.0",
-    "lint-staged": "^7.3.0",
+    "lint-staged": "^8.0.2",
     "lz-string": "^1.4.4",
     "majo": "^0.6.2",
     "mockdate": "^2.0.2",