Merge pull request #37 from andnp/greenkeeper/simplytyped-3.0.0

Update simplytyped to the latest version 🚀

Author: andnp

package.json

@@ -54,7 +54,7 @@
   },
   "dependencies": {
     "ajv": "^6.5.0",
-    "simplytyped": "^2.0.0",
+    "simplytyped": "^3.0.0",
     "tslib": "^1.9.3",
     "type-level-schema": "^1.3.2"
   },