chore(deps): update dependency electron to v4.2.9

Author: renovate-bot

package.json

@@ -114,7 +114,7 @@
     "css-loader": "3.2.0",
     "del": "5.0.0",
     "detect-port": "1.3.0",
-    "electron": "4.2.3",
+    "electron": "4.2.9",
     "electron-builder": "21.2.0",
     "express": "4.17.1",
     "file-loader": "4.2.0",

yarn.lock

@@ -4382,10 +4382,10 @@ [email protected]:
     jsonfile "^4.0.0"
     mkdirp "^0.5.1"
 
-[email protected].3:
-  version "4.2.3"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-4.2.3.tgz#5d45da9dd5ae97269dbee2623840da808c72d29d"
-  integrity sha512-nx+jHxj2eNhaYHXFGdzr7zgSphpVHEU9WAu6qqEUsQ936X3c6bQ5Bdg08KbHZj+cyRRQ06JMu6/ILh5pWrDZaA==
+[email protected].9:
+  version "4.2.9"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-4.2.9.tgz#81226aa1ba58e1b05388474faf5a815010a11ea2"
+  integrity sha512-zC7K3GOiZKmxqllVG/qq/Gx+qQvyolKj5xKKwXMqIGekfokEW2hvoIO5Yh7KCoAh5dqBtpzOJjS4fj1se+YBcg==
   dependencies:
     "@types/node" "^10.12.18"
     electron-download "^4.1.0"