build(deps-dev): bump electron from 6.0.3 to 6.0.4

Bumps [electron](https://github.com/electron/electron) from 6.0.3 to 6.0.4.
- [Release notes](https://github.com/electron/electron/releases)
- [Commits](https://github.com/electron/electron/compare/v6.0.3...v6.0.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package-lock.json

@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "@types/node": {
-      "version": "10.14.15",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.15.tgz",
-      "integrity": "sha512-CBR5avlLcu0YCILJiDIXeU2pTw7UK/NIxfC63m7d7CVamho1qDEzXKkOtEauQRPMy6MI8mLozth+JJkas7HY6g==",
+      "version": "10.14.16",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.16.tgz",
+      "integrity": "sha512-/opXIbfn0P+VLt+N8DE4l8Mn8rbhiJgabU96ZJ0p9mxOkIks5gh6RUnpHak7Yh0SFkyjO/ODbxsQQPV2bpMmyA==",
       "dev": true
     },
     "ajv": {
@@ -231,9 +231,9 @@
       }
     },
     "electron": {
-      "version": "6.0.3",
-      "resolved": "https://registry.npmjs.org/electron/-/electron-6.0.3.tgz",
-      "integrity": "sha512-+AFB075WVf4LBR4bdPlkGn/jYQOZ7kC4GpZBeZ3/Fj5SCoFP51TAA5HuPWdMF2KQWjpxx/18jDGqMTYWhIRsEw==",
+      "version": "6.0.4",
+      "resolved": "https://registry.npmjs.org/electron/-/electron-6.0.4.tgz",
+      "integrity": "sha512-zrPi36etADOAjxnVX6TxRNKSWaBscMLd9S7AB+qISzI0dnYIDKycHpc2mB+5QWBd/8cR4m/1NLNTqNhX5KKGFg==",
       "dev": true,
       "requires": {
         "@types/node": "^10.12.18",

package.json

@@ -17,6 +17,6 @@
   "author": "GitHub",
   "license": "CC0-1.0",
   "devDependencies": {
-    "electron": "^6.0.3"
+    "electron": "^6.0.4"
   }
 }