Update lockfile for @babel/parser version bump.

Author: Robert Jackson

yarn.lock

@@ -16,7 +16,7 @@
     esutils "^2.0.2"
     js-tokens "^3.0.0"
 
-"@babel/parser@^7.0.0-beta.51":
+"@babel/parser@^7.0.0-beta.53":
   version "7.0.0-beta.53"
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.0.0-beta.53.tgz#1f45eb617bf9463d482b2c04d349d9e4edbf4892"