bump lockfile

yarn.lock

@@ -196,13 +196,7 @@ async-each@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/async-each/-/async-each-1.0.1.tgz#19d386a1d9edc6e7c1c85d388aedbcc56d33602d"
 
-async@^2.1.2:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.3.0.tgz#1013d1051047dd320fe24e494d5c66ecaf6147d9"
-  dependencies:
-    lodash "^4.14.0"
-
-async@^2.4.1:
+async@^2.1.2, async@^2.4.1:
   version "2.5.0"
   resolved "https://registry.yarnpkg.com/async/-/async-2.5.0.tgz#843190fd6b7357a0b9e1c956edddd5ec8462b54d"
   dependencies:
@@ -1690,10 +1684,6 @@ esprima@^2.6.0, esprima@^2.7.1:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
 
-esprima@^3.1.1:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
-
 esprima@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
@@ -2477,14 +2467,7 @@ js-tokens@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.1.tgz#08e9f132484a2c45a30907e9dc4d5567b7f114d7"
 
-js-yaml@^3.4.3, js-yaml@^3.5.1:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.8.3.tgz#33a05ec481c850c8875929166fe1beb61c728766"
-  dependencies:
-    argparse "^1.0.7"
-    esprima "^3.1.1"
-
-js-yaml@^3.9.0:
+js-yaml@^3.4.3, js-yaml@^3.5.1, js-yaml@^3.9.0:
   version "3.9.0"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.9.0.tgz#4ffbbf25c2ac963b8299dc74da7e3740de1c18ce"
   dependencies:
@@ -3553,22 +3536,14 @@ postcss@^5.0.10, postcss@^5.0.11, postcss@^5.0.12, postcss@^5.0.13, postcss@^5.0
     source-map "^0.5.6"
     supports-color "^3.2.3"
 
-postcss@^6.0.0, postcss@^6.0.6:
+postcss@^6.0.0, postcss@^6.0.1, postcss@^6.0.6:
   version "6.0.6"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.6.tgz#bba4d58e884fc78c840d1539e10eddaabb8f73bd"
   dependencies:
     chalk "^2.0.1"
     source-map "^0.5.6"
     supports-color "^4.1.0"
 
-postcss@^6.0.1:
-  version "6.0.3"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.3.tgz#b7f565b3d956fbb8565ca7c1e239d0506e427d8b"
-  dependencies:
-    chalk "^1.1.3"
-    source-map "^0.5.6"
-    supports-color "^4.0.0"
-
 prelude-ls@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
@@ -4291,13 +4266,7 @@ supports-color@^3.2.3:
   dependencies:
     has-flag "^1.0.0"
 
-supports-color@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.0.0.tgz#33a7c680aa512c9d03ef929cacbb974d203d2790"
-  dependencies:
-    has-flag "^2.0.0"
-
-supports-color@^4.1.0:
+supports-color@^4.0.0, supports-color@^4.1.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.2.0.tgz#ad986dc7eb2315d009b4d77c8169c2231a684037"
   dependencies: