[Snyk] Upgrade karma-firefox-launcher from 1.3.0 to 2.1.2 (#382)

Snyk has created this PR to upgrade karma-firefox-launcher from 1.3.0 to 2.1.2.

See this package in npm:
https://www.npmjs.com/package/karma-firefox-launcher

See this project in Snyk:
https://app.snyk.io/org/chia-network/project/e887fc45-cae4-47fc-931a-813664d517cd?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

js-bindings/package.json

@@ -44,7 +44,7 @@
     "buffer": "^6.0.3",
     "crypto-browserify": "^3.12.0",
     "karma": "^6.3.4",
-    "karma-firefox-launcher": "^1.3.0",
+    "karma-firefox-launcher": "^2.1.2",
     "karma-mocha": "^2.0.1",
     "karma-mocha-reporter": "^2.2.5",
     "karma-webpack": "^5.0.0",