Bump electron-is-dev from 1.2.0 to 2.0.0 in /app

Bumps [electron-is-dev](https://github.com/sindresorhus/electron-is-dev) from 1.2.0 to 2.0.0.
- [Release notes](https://github.com/sindresorhus/electron-is-dev/releases)
- [Commits](https://github.com/sindresorhus/electron-is-dev/compare/v1.2.0...v2.0.0)

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

app/package.json

@@ -25,7 +25,7 @@
     "@terminus-term/node-pty": "0.10.0-terminus.3",
     "electron-config": "2.0.0",
     "electron-debug": "^3.2.0",
-    "electron-is-dev": "1.2.0",
+    "electron-is-dev": "2.0.0",
     "electron-promise-ipc": "^2.2.4",
     "fontmanager-redux": "1.0.0",
     "glasstron": "0.0.7",