[WS-2021-0638][Security] bump mocha to 10.1.0

In our current repo, most mocha tests have been changed
to jest in this issue:
opensearch-project#215

The fix for the above issue
(mochajs/mocha@61b4b92)
is only released in the latest version v10.1.0:
https://github.com/mochajs/mocha/blob/5f96d511dbf913f135b92198aab721a27f6b44fe/lib/utils.js#L79

Though it is a bump from 7.2.0 to 10.1.0, I don't see breaking
changes for plugins or users.

Signed-off-by: Anan Zhuang <ananzh@amazon.com>

Author: ananzh

package.json

@@ -407,7 +407,7 @@
     "load-grunt-config": "^4.0.1",
     "load-json-file": "^6.2.0",
     "markdown-it": "^12.3.2",
-    "mocha": "^7.2.0",
+    "mocha": "10.1.0",
     "mock-fs": "^4.12.0",
     "monaco-editor": "~0.17.0",
     "ms-chromium-edge-driver": "^0.4.3",