Upgrade packages

Author: ryanhefner

yarn.lock

@@ -1814,8 +1814,8 @@ js-tokens@^3.0.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
 js-yaml@^3.7.0:
-  version "3.9.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.9.0.tgz#4ffbbf25c2ac963b8299dc74da7e3740de1c18ce"
+  version "3.9.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.9.1.tgz#08775cebdfdd359209f0d2acd383c8f86a6904a0"
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"
@@ -2800,8 +2800,8 @@ uglify-js@^2.6:
     uglify-to-browserify "~1.0.0"
 
 uglify-js@^3.0.9:
-  version "3.0.26"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.0.26.tgz#ba279ca597b13fe6c62c2d87dd5188e57a7a3233"
+  version "3.0.27"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.0.27.tgz#a97db8c8ba6b9dba4e2f88d86aa9548fa6320034"
   dependencies:
     commander "~2.11.0"
     source-map "~0.5.1"