Bump eslint-plugin-json from 2.1.2 to 3.0.0 in /glean (#280)

Bumps [eslint-plugin-json](https://github.com/azeemba/eslint-plugin-json) from 2.1.2 to 3.0.0.
- [Release notes](https://github.com/azeemba/eslint-plugin-json/releases)
- [Commits](https://github.com/azeemba/eslint-plugin-json/commits/v3.0.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

glean/package-lock.json

@@ -76,7 +76,7 @@
     "@typescript-eslint/parser": "^4.15.1",
     "eslint": "^7.19.0",
     "eslint-plugin-jsdoc": "^33.0.0",
-    "eslint-plugin-json": "^2.1.2",
+    "eslint-plugin-json": "^3.0.0",
     "eslint-plugin-mocha": "^8.0.0",
     "eslint-plugin-notice": "^0.9.10",
     "geckodriver": "^1.22.1",