chore(deps): update dependency pkg to v4.3.7

Author: renovate-bot

packages/server/package.json

@@ -42,7 +42,7 @@
     "babel-plugin-add-module-exports": "0.2.1",
     "flow-bin": "0.61.0",
     "nodemon": "1.14.3",
-    "pkg": "4.3.0-beta.5"
+    "pkg": "4.3.7"
   },
   "babel": {
     "presets": [