Install @types/mocha

Author: justinfagnani

package-lock.json

@@ -272,6 +272,7 @@
     "@rollup/plugin-node-resolve": "^15.0.1",
     "@rollup/plugin-replace": "^5.0.1",
     "@rollup/plugin-terser": "^0.1.0",
+    "@types/mocha": "^10.0.7",
     "@types/semver": "^7.3.6",
     "@typescript-eslint/eslint-plugin": "^6.7.5",
     "@typescript-eslint/parser": "^6.7.5",