Fix false dev dependency

package.json

@@ -81,7 +81,6 @@
     "cspell": "^4.0.23",
     "electron": "5.0.5",
     "electron-builder": "21.0.6",
-    "fs-extra": "^8.0.1",
     "mime": "^2.4.0",
     "mocha": "^6.1.4",
     "mustache": "^3.0.1",
@@ -107,6 +106,7 @@
     "electron-log": "^3.0.6",
     "electron-telemetry": "git+https://github.com/thomasnordquist/electron-telemetry.git#dist",
     "electron-updater": "^4.0.6",
+    "fs-extra": "^8.0.1",
     "js-base64": "^2.5.1",
     "json-to-ast": "^2.1.0",
     "lowdb": "^1.0.0",