update react-docgen-typescript

Author: hipstersmoothie

package.json

@@ -26,7 +26,7 @@
     "debug": "^4.1.1",
     "endent": "^2.0.1",
     "micromatch": "^4.0.2",
-    "react-docgen-typescript": "^1.16.6",
+    "react-docgen-typescript": "^1.20.1",
     "react-docgen-typescript-loader": "^3.7.2",
     "tslib": "^2.0.0"
   },