Upgrade electron to v4

package.json

@@ -17,7 +17,7 @@
     "watch": "webpack-dev-server --hot"
   },
   "config": {
-    "electron-version": "3.0.8"
+    "electron-version": "4.2.12"
   },
   "repository": {
     "type": "git",
@@ -147,7 +147,7 @@
     "css-loader": "^0.19.0",
     "devtron": "^1.1.0",
     "dom-storage": "^2.0.2",
-    "electron": "3.0.8",
+    "electron": "4",
     "electron-debug": "^2.2.0",
     "electron-devtools-installer": "^2.2.4",
     "electron-packager": "^12.2.0",

yarn.lock

@@ -117,9 +117,10 @@
   dependencies:
     meaw "^2.0.0"
 
-"@types/node@^8.0.24":
-  version "8.10.17"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.17.tgz#d48cf10f0dc6dcf59f827f5a3fc7a4a6004318d3"
+"@types/node@^10.12.18":
+  version "10.17.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.17.0.tgz#537c61a1df699a8331c79dab2ccc2c8799873c66"
+  integrity sha512-wuJwN2KV4tIRz1bu9vq5kSPasJ8IsEjZaP1ZR7KlmdUZvGF/rXy8DmXOVwUD0kAtvtJ7aqMKPqUXC0NUTDbrDg==
 
 "JSV@>= 4.0.x":
   version "4.0.2"
@@ -3072,11 +3073,12 @@ electron-winstaller@^2.2.0:
     lodash.template "^4.2.2"
     temp "^0.8.3"
 
-electron@3.0.8:
-  version "3.0.8"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-3.0.8.tgz#7905806ebaead4c693531e11cda6568c32efa7bb"
+electron@4:
+  version "4.2.12"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-4.2.12.tgz#8e8926a6a6654cde5eb0612952fed98a56941875"
+  integrity sha512-EES8eMztoW8gEP5E4GQLP8slrfS2jqTYtHbu36mlu3k1xYAaNPyQQr6mCILkYxqj4l3la4CT2Vcs89CUG62vcQ==
   dependencies:
-    "@types/node" "^8.0.24"
+    "@types/node" "^10.12.18"
     electron-download "^4.1.0"
     extract-zip "^1.0.3"