Add vscode debug config

Author: vladkampov

.vscode/launch.json

@@ -0,0 +1,11 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "attach",
+      "name": "Attach",
+      "port": 9229
+    }
+  ]
+}

package.json

@@ -30,6 +30,7 @@
     "lint": "eslint ./src/**.js",
     "coverage": "jest --coverage --config=conf/jest.config.js",
     "test": "jest --config=conf/jest.config.js",
+    "debug": "node --inspect-brk node_modules/.bin/jest --runInBand  --config=conf/jest.config.js",
     "test:watch": "jest --watch"
   }
 }