deps: use latest jsSHA

callstats no longer depends on it and it doesn't break when we use the latest.

package.json

   ],
   "author": "",
   "readmeFilename": "README.md",
-  "//": "Callstats.io does not work with recent versions of jsSHA (2.0.1 in particular)",
   "dependencies": {
     "@atlaskit/avatar": "4.0.5",
     "@atlaskit/button": "3.0.0",
     "jquery-i18next": "1.2.0",
     "jQuery-Impromptu": "trentrichardson/jQuery-Impromptu#v6.0.0",
     "jquery-ui": "1.10.5",
-    "jssha": "1.5.0",
+    "jssha": "2.2.0",
     "jwt-decode": "2.2.0",
     "lib-jitsi-meet": "jitsi/lib-jitsi-meet",
     "lodash": "4.17.4",