Update to electron 5 (#522)

Author: amaury1093

packages/fether-electron/package.json

@@ -58,10 +58,10 @@
   "devDependencies": {
     "copyfiles": "^2.1.0",
     "cross-env": "^5.2.0",
-    "electron": "^4.0.1",
+    "electron": "^5.0.1",
     "electron-builder": "^20.38.5",
     "electron-webpack": "^2.6.1",
     "webpack": "^4.29.1",
     "webpack-build-notifier": "^0.1.30"
   }
-}
+}

yarn.lock

@@ -5599,10 +5599,10 @@ electron-webpack@^2.6.1:
     webpack-merge "^4.2.1"
     yargs "^12.0.5"
 
-electron@^4.0.1:
-  version "4.1.4"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-4.1.4.tgz#41ba9e041f38c25c62a7db806884410654df058f"
-  integrity sha512-MelOjntJvd33izEjR6H4N/Uii7y535z/b2BuYXJGLNSHL6o1IlyhUQmfiT87kWABayERgeuYERgvsyf956OOFw==
+electron@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-5.0.1.tgz#6bd7bf4d25e9bfce4cccd629d587fba5281f95cc"
+  integrity sha512-8KksyhAPcpXVeO8ViVGxfZAuf8yEVBCtV0h/lMBD8VFbCQ9icej1K5csCFAGirbZbqOz5IdsBZX9Gpb9n4RCag==
   dependencies:
     "@types/node" "^10.12.18"
     electron-download "^4.1.0"