Move electron to devDeps because electron-builder requires it

package.json

@@ -32,7 +32,6 @@
     "@ledgerhq/hw-app-eth": "^1.0.4",
     "babel-loader": "^7.1.2",
     "color": "^2.0.1",
-    "electron": "1.7.10",
     "electron-devtools-installer": "^2.2.3",
     "file-loader": "^1.1.6",
     "history": "^4.7.2",
@@ -61,6 +60,7 @@
     "babel-preset-flow": "^6.23.0",
     "babel-preset-react": "^6.24.1",
     "babel-preset-stage-0": "^6.24.1",
+    "electron": "1.7.10",
     "electron-builder": "^19.49.0",
     "electron-rebuild": "^1.6.1",
     "electron-webpack": "1.11.0",

src/main/app.js

@@ -1,6 +1,6 @@
 // @flow
 
-import { app, BrowserWindow } from 'electron'
+import { app, BrowserWindow } from 'electron' // eslint-disable-line import/no-extraneous-dependencies
 
 // Global reference to mainWindow
 // Necessary to prevent win from being garbage collected

src/main/bridge.js

@@ -1,7 +1,7 @@
 // @flow
 
 import { fork } from 'child_process'
-import { ipcMain } from 'electron'
+import { ipcMain } from 'electron' // eslint-disable-line import/no-extraneous-dependencies
 import { resolve } from 'path'
 
 // $FlowFixMe

src/renderer/initEvents.js

@@ -1,6 +1,6 @@
 // @flow
 
-import { ipcRenderer } from 'electron'
+import { ipcRenderer } from 'electron' // eslint-disable-line import/no-extraneous-dependencies
 import objectPath from 'object-path'
 
 import { devicesUpdate, deviceAdd, deviceRemove } from 'actions/devices'