Upgrade dependencies

Author: alexdevero

package.json

@@ -53,7 +53,7 @@
     "extract-text-webpack-plugin": "^3.0.2",
     "file-loader": "^1.1.6",
     "html-webpack-plugin": "^2.30.1",
-    "postcss-cssnext": "^3.0.2",
+    "postcss-cssnext": "^3.1.0",
     "postcss-import": "^11.0.0",
     "postcss-loader": "^2.0.10",
     "postcss-nested": "^3.0.0",
@@ -62,6 +62,6 @@
     "react-dom": "^16.2.0",
     "style-loader": "^0.19.1",
     "webpack": "^3.10.0",
-    "webpack-dev-server": "^2.11.0"
+    "webpack-dev-server": "^2.11.1"
   }
 }

yarn.lock

@@ -2,10 +2,6 @@
 # yarn lockfile v1
 
 
-"@std/esm@^0.16.0":
-  version "0.16.0"
-  resolved "https://registry.yarnpkg.com/@std/esm/-/esm-0.16.0.tgz#2a7a33ecb7f1701cebd4c87df6d0d945ed51f730"
-
 "@types/node@^7.0.18":
   version "7.0.51"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-7.0.51.tgz#1fb9bd2c7d28b1e8b1fe438f01494d0da8e451af"
@@ -4130,9 +4126,9 @@ postcss-convert-values@^2.3.4:
     postcss "^5.0.11"
     postcss-value-parser "^3.1.2"
 
-postcss-cssnext@^3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-cssnext/-/postcss-cssnext-3.0.2.tgz#63b77adb0b8a4c1d5ec32cd345539535a3417d48"
+postcss-cssnext@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-cssnext/-/postcss-cssnext-3.1.0.tgz#927dc29341a938254cde38ea60a923b9dfedead9"
   dependencies:
     autoprefixer "^7.1.1"
     caniuse-api "^2.0.0"
@@ -4154,7 +4150,7 @@ postcss-cssnext@^3.0.2:
     postcss-custom-media "^6.0.0"
     postcss-custom-properties "^6.1.0"
     postcss-custom-selectors "^4.0.1"
-    postcss-font-family-system-ui "^2.0.1"
+    postcss-font-family-system-ui "^3.0.0"
     postcss-font-variant "^3.0.0"
     postcss-image-set-polyfill "^0.3.5"
     postcss-initial "^2.0.0"
@@ -4224,14 +4220,11 @@ postcss-filter-plugins@^2.0.0:
     postcss "^5.0.4"
     uniqid "^4.0.0"
 
-postcss-font-family-system-ui@^2.0.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-font-family-system-ui/-/postcss-font-family-system-ui-2.1.1.tgz#1ee54246cd02b199755ebe5781b91188ed908006"
+postcss-font-family-system-ui@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/postcss-font-family-system-ui/-/postcss-font-family-system-ui-3.0.0.tgz#675fe7a9e029669f05f8dba2e44c2225ede80623"
   dependencies:
-    "@std/esm" "^0.16.0"
-    lodash "^4.17.4"
-    postcss "^6.0.1"
-    postcss-value-parser "^3.3.0"
+    postcss "^6.0"
 
 postcss-font-variant@^3.0.0:
   version "3.0.0"
@@ -4542,6 +4535,14 @@ 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:
+  version "6.0.16"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.16.tgz#112e2fe2a6d2109be0957687243170ea5589e146"
+  dependencies:
+    chalk "^2.3.0"
+    source-map "^0.6.1"
+    supports-color "^5.1.0"
+
 postcss@^6.0.0, postcss@^6.0.1, postcss@^6.0.11, postcss@^6.0.13, postcss@^6.0.14, postcss@^6.0.5, postcss@^6.0.6:
   version "6.0.14"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.14.tgz#5534c72114739e75d0afcf017db853099f562885"
@@ -5869,9 +5870,9 @@ [email protected]:
     range-parser "^1.0.3"
     time-stamp "^2.0.0"
 
-webpack-dev-server@^2.11.0:
-  version "2.11.0"
-  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-2.11.0.tgz#e9d4830ab7eb16c6f92ed68b92f6089027960e1b"
+webpack-dev-server@^2.11.1:
+  version "2.11.1"
+  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-2.11.1.tgz#6f9358a002db8403f016e336816f4485384e5ec0"
   dependencies:
     ansi-html "0.0.7"
     array-includes "^3.0.3"
@@ -5896,7 +5897,7 @@ webpack-dev-server@^2.11.0:
     sockjs "0.3.19"
     sockjs-client "1.1.4"
     spdy "^3.4.1"
-    strip-ansi "^4.0.0"
+    strip-ansi "^3.0.0"
     supports-color "^5.1.0"
     webpack-dev-middleware "1.12.2"
     yargs "6.6.0"