revert spectron, @type/webdriverio versions from master

package.json

@@ -210,7 +210,7 @@
     "@types/tempy": "^0.3.0",
     "@types/universal-analytics": "^0.4.4",
     "@types/uuid": "^8.0.0",
-    "@types/webdriverio": "^5.0.0",
+    "@types/webdriverio": "^4.13.0",
     "@types/webpack": "^4.41.17",
     "@types/webpack-dev-server": "^3.11.0",
     "ace-builds": "^1.4.11",
@@ -254,7 +254,7 @@
     "react-window": "^1.8.5",
     "sass-loader": "^8.0.2",
     "source-map-support": "^0.5.19",
-    "spectron": "^11.0.0",
+    "spectron": "^8.0.0",
     "ts-jest": "^26.1.0",
     "ts-loader": "^7.0.5",
     "ts-node": "^8.10.2",