dependencies: Remove @types/node.

Electron already depends on the @types/node and extends
it in electron.d.ts.

Author: priyank-p

package.json

@@ -132,7 +132,6 @@
   ],
   "devDependencies": {
     "@types/adm-zip": "^0.4.32",
-    "@types/node": "10.1.0",
     "@typescript-eslint/eslint-plugin": "1.10.2",
     "@typescript-eslint/parser": "1.10.2",
     "assert": "1.4.1",