chore(package): update electron-rebuild to version 1.8.4

Closes #305

Author: greenkeeper[bot]

package.json

@@ -69,7 +69,7 @@
     "awesome-typescript-loader": "5.2.0",
     "codelyzer": "4.0.0",
     "cspell": "2.1.1",
-    "electron-rebuild": "1.7.3",
+    "electron-rebuild": "1.8.4",
     "electron-reload": "1.3.0",
     "fs-extra": "7.0.1",
     "glob": "7.1.2",