Update dependency less to v3.9.0

package.json

@@ -27,7 +27,7 @@
     "jsdom": "11.7.0",
     "jsdom-global": "3.0.2",
     "lerna": "2.10.0",
-    "less": "3.0.1",
+    "less": "3.9.0",
     "less-loader": "4.1.0",
     "node-dev": "3.1.3",
     "react-docgen-typescript-webpack-plugin": "1.1.0",

yarn.lock

@@ -2533,7 +2533,7 @@ clone@^1.0.0, clone@^1.0.2:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/clone/-/clone-1.0.4.tgz#da309cc263df15994c688ca902179ca3c7cd7c7e"
 
-clone@^2.1.1:
+clone@^2.1.1, clone@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.2.tgz#1b7f4b9f591f1e8f83670401600345a02887435f"
 
@@ -6479,18 +6479,20 @@ [email protected]:
     loader-utils "^1.1.0"
     pify "^3.0.0"
 
-[email protected]:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/less/-/less-3.0.1.tgz#ba2fea24a5632ccb8c84230d6043c0bf91855e37"
+[email protected]:
+  version "3.9.0"
+  resolved "https://registry.yarnpkg.com/less/-/less-3.9.0.tgz#b7511c43f37cf57dc87dffd9883ec121289b1474"
+  dependencies:
+    clone "^2.1.2"
   optionalDependencies:
     errno "^0.1.1"
     graceful-fs "^4.1.2"
     image-size "~0.5.0"
     mime "^1.4.1"
     mkdirp "^0.5.0"
     promise "^7.1.1"
-    request "2.81.0"
-    source-map "^0.5.3"
+    request "^2.83.0"
+    source-map "~0.6.0"
 
 leven@^2.1.0:
   version "2.1.0"
@@ -9443,7 +9445,7 @@ source-map@^0.4.4:
   dependencies:
     amdefine ">=0.0.4"
 
-source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
+source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"