Merge pull request #50 from boyuai/dependabot/npm_and_yarn/async-2.6.4

chore(deps): bump async from 2.6.3 to 2.6.4

Author: helsonxiao

yarn.lock

@@ -3281,9 +3281,9 @@ async-validator@^3.0.3:
   integrity sha512-DDmKA7sdSAJtTVeNZHrnr2yojfFaoeW8MfQN8CeuXg8DDQHTqKk9Fdv38dSvnesHoO8MUwMI2HphOeSyIF+wmQ==
 
 async@^2.6.1, async@^2.6.2:
-  version "2.6.3"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.3.tgz#d72625e2344a3656e3a3ad4fa749fa83299d82ff"
-  integrity sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
+  integrity sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==
   dependencies:
     lodash "^4.17.14"