Downgrade electron again to version 8 (from 9) due to code signing fa…

…iled on Mac

package.json

@@ -19,7 +19,7 @@
   "main": "background.js",
   "dependencies": {
     "@fortawesome/fontawesome-free": "^5.12.1",
-    "electron": "^9.1.0",
+    "electron": "^8.3",
     "lodash": "^4.17.15",
     "node-vmix": "^1.2.0",
     "vmix-js-utils": "^3.8.1",

yarn.lock

@@ -2919,10 +2919,10 @@ electron-to-chromium@^1.3.483:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.483.tgz#9269e7cfc1c8e72709824da171cbe47ca5e3ca9e"
   integrity sha512-+05RF8S9rk8S0G8eBCqBRBaRq7+UN3lDs2DAvnG8SBSgQO3hjy0+qt4CmRk5eiuGbTcaicgXfPmBi31a+BD3lg==
 
-electron@^9.1.0:
-  version "9.1.0"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-9.1.0.tgz#ca77600c9e4cd591298c340e013384114d3d8d05"
-  integrity sha512-VRAF8KX1m0py9I9sf0kw1kWfeC87mlscfFcbcRdLBsNJ44/GrJhi3+E8rKbpHUeZNQxsPaVA5Zu5Lxb6dV/scQ==
+electron@^8.3:
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-8.4.0.tgz#30692166dc8b2a511b3c01c70960d467efe2b8e6"
+  integrity sha512-SpgyccM5rjDJSGcpQjiviUBT44fZlSyhcjy8RpKSnAad+co4xY1vYj6T25U1CfSk0PH/dhvcp63P2sdXHCwq/Q==
   dependencies:
     "@electron/get" "^1.0.1"
     "@types/node" "^12.0.12"