Bump json from 9.0.4 to 10.0.0

Bumps [json](https://github.com/trentm/json) from 9.0.4 to 10.0.0.
- [Release notes](https://github.com/trentm/json/releases)
- [Changelog](https://github.com/trentm/json/blob/master/CHANGES.md)
- [Commits](trentm/json@9.0.4...10.0.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "google-closure-compiler": "20180402.0.0",
     "google-closure-library": "20180204.0.0",
     "graceful-fs": "4.1.11",
-    "json": "9.0.4",
+    "json": "10.0.0",
     "rimraf": "2.6.2",
     "scratch-l10n": "^3.7.20191219145348",
     "selenium-webdriver": "^4.0.0-alpha.1",