Update to Electron 4.0.8

package.json

@@ -121,7 +121,7 @@
     "asar": "0.14.0",
     "bower": "1.8.2",
     "chai": "4.1.2",
-    "electron": "4.0.5",
+    "electron": "4.0.8",
     "electron-builder": "20.31.3",
     "electron-icon-maker": "0.0.3",
     "eslint": "4.14.0",

yarn.lock

@@ -2649,10 +2649,10 @@ electron-updater@3.0.3:
     semver "^5.5.0"
     source-map-support "^0.5.6"
 
-electron@4.0.5:
-  version "4.0.5"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-4.0.5.tgz#d8e7d8a581a3e31071b2226129b26b6110c1d877"
-  integrity sha512-UWFH6SrzNtzfvusGUFYxXDrgsUEbtBXkH/66hpDWxjA2Ckt7ozcYIujZpshbr7LPy8kV3ZRxIvoyCMdaS5DkVQ==
+electron@4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-4.0.8.tgz#b7998b16543d2094f081757a0c5afdb8875ea510"
+  integrity sha512-FOBJIHkuv8wc15N+ZyqwDzPavYVu5CHMBEf14jHDWv7QW2vkEIpJjVK+PIT31kfZfvjsIP0j2wvA/FBsiqB7pw==
   dependencies:
     "@types/node" "^10.12.18"
     electron-download "^4.1.0"