update dependency

Author: mjhm

package.json

@@ -44,7 +44,7 @@
     "ajv": "5.2.2",
     "chai": "^4.2.0",
     "eslint": "^6.2.2",
-    "mocha": "^8.0.1",
+    "mocha": "^8.1.2",
     "pegjs": "^0.10.0",
     "pegjs-backtrace": "^0.1.2",
     "rewire": "^4.0.1",