diff --git a/package.json b/package.json
index 08da59e5c1..5917364d73 100644
--- a/package.json
+++ b/package.json
@@ -11,8 +11,8 @@
     "bin",
     "lib"
   ],
-  "engines" : {
-    "node" : ">=4.2.0"
+  "engines": {
+    "node": ">=4.2.0"
   },
   "devDependencies": {
     "ava": "^0.17.0",
diff --git a/yarn.lock b/yarn.lock
index 06840b05bb..710e46a763 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1000,8 +1000,8 @@ babel-types@^6.13.0, babel-types@^6.15.0, babel-types@^6.16.0, babel-types@^6.18
     to-fast-properties "^1.0.1"
 
 babylon@^6.1.0, babylon@^6.11.0, babylon@^6.13.0:
-  version "6.14.1"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.14.1.tgz#956275fab72753ad9b3435d7afe58f8bf0a29815"
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.15.0.tgz#ba65cfa1a80e1759b0e89fb562e27dccae70348e"
 
 balanced-match@^0.4.1:
   version "0.4.2"
@@ -1329,12 +1329,11 @@ create-error-class@^3.0.1:
   dependencies:
     capture-stack-trace "^1.0.0"
 
-cross-env@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-2.0.1.tgz#f283b4039ea759ada9ab7e987ad3bddb241b79a6"
+cross-env@^3.1.4:
+  version "3.1.4"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-3.1.4.tgz#56e8bca96f17908a6eb1bc2012ca126f92842130"
   dependencies:
     cross-spawn "^3.0.1"
-    lodash.assign "^3.2.0"
 
 cross-spawn@^3.0.1:
   version "3.0.1"
@@ -2447,45 +2446,6 @@ load-json-file@^1.0.0, load-json-file@^1.1.0:
     pinkie-promise "^2.0.0"
     strip-bom "^2.0.0"
 
-lodash._baseassign@^3.0.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz#8c38a099500f215ad09e59f1722fd0c52bfe0a4e"
-  dependencies:
-    lodash._basecopy "^3.0.0"
-    lodash.keys "^3.0.0"
-
-lodash._basecopy@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/lodash._basecopy/-/lodash._basecopy-3.0.1.tgz#8da0e6a876cf344c0ad8a54882111dd3c5c7ca36"
-
-lodash._bindcallback@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/lodash._bindcallback/-/lodash._bindcallback-3.0.1.tgz#e531c27644cf8b57a99e17ed95b35c748789392e"
-
-lodash._createassigner@^3.0.0:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/lodash._createassigner/-/lodash._createassigner-3.1.1.tgz#838a5bae2fdaca63ac22dee8e19fa4e6d6970b11"
-  dependencies:
-    lodash._bindcallback "^3.0.0"
-    lodash._isiterateecall "^3.0.0"
-    lodash.restparam "^3.0.0"
-
-lodash._getnative@^3.0.0:
-  version "3.9.1"
-  resolved "https://registry.yarnpkg.com/lodash._getnative/-/lodash._getnative-3.9.1.tgz#570bc7dede46d61cdcde687d65d3eecbaa3aaff5"
-
-lodash._isiterateecall@^3.0.0:
-  version "3.0.9"
-  resolved "https://registry.yarnpkg.com/lodash._isiterateecall/-/lodash._isiterateecall-3.0.9.tgz#5203ad7ba425fae842460e696db9cf3e6aac057c"
-
-lodash.assign@^3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/lodash.assign/-/lodash.assign-3.2.0.tgz#3ce9f0234b4b2223e296b8fa0ac1fee8ebca64fa"
-  dependencies:
-    lodash._baseassign "^3.0.0"
-    lodash._createassigner "^3.0.0"
-    lodash.keys "^3.0.0"
-
 lodash.debounce@^4.0.3:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
@@ -2498,34 +2458,14 @@ lodash.flatten@^4.2.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/lodash.flatten/-/lodash.flatten-4.4.0.tgz#f31c22225a9632d2bbf8e4addbef240aa765a61f"
 
-lodash.isarguments@^3.0.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz#2f573d85c6a24289ff00663b491c1d338ff3458a"
-
-lodash.isarray@^3.0.0:
-  version "3.0.4"
-  resolved "https://registry.yarnpkg.com/lodash.isarray/-/lodash.isarray-3.0.4.tgz#79e4eb88c36a8122af86f844aa9bcd851b5fbb55"
-
 lodash.isequal@^4.4.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
 
-lodash.keys@^3.0.0:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/lodash.keys/-/lodash.keys-3.1.2.tgz#4dbc0472b156be50a0b286855d1bd0b0c656098a"
-  dependencies:
-    lodash._getnative "^3.0.0"
-    lodash.isarguments "^3.0.0"
-    lodash.isarray "^3.0.0"
-
 lodash.pickby@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/lodash.pickby/-/lodash.pickby-4.6.0.tgz#7dea21d8c18d7703a27c704c15d3b84a67e33aff"
 
-lodash.restparam@^3.0.0:
-  version "3.6.1"
-  resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
-
 lodash@^4.0.0, lodash@^4.15.0, lodash@^4.2.0, lodash@^4.3.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"