chore(deps): update dependency ast-types to ^0.13.0 (#1276)

Author: renovate[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "@babel/types": "7.4.4",
     "apollo-env": "file:../apollo-env",
     "apollo-language-server": "file:../apollo-language-server",
-    "ast-types": "^0.12.0",
+    "ast-types": "^0.13.0",
     "common-tags": "^1.5.1",
     "recast": "^0.18.0"
   },