Remove npm-run-all

We can just use posttest

package.json

@@ -33,7 +33,6 @@
     "merge-stream": "^1.0.1",
     "node-pty": "0.7.6",
     "nodemon": "1.10.2",
-    "npm-run-all": "^4.1.2",
     "nyc": "^11.8.0",
     "sorcery": "^0.10.0",
     "source-map-loader": "^0.2.3",
@@ -51,7 +50,8 @@
     "start": "node demo/start",
     "start-zmodem": "node demo/zmodem/app",
     "lint": "tslint 'src/**/*.ts' './demo/**/*.ts'",
-    "test": "npm-run-all mocha lint",
+    "test": "npm run mocha",
+    "posttest": "npm run lint",
     "test-debug": "node --inspect-brk node_modules/.bin/gulp test",
     "test-suite": "gulp mocha-suite --test",
     "test-coverage": "nyc -x gulpfile.js -x '**/*test*' npm run mocha",