Downgrade less to allow successful build

Author: wojtekmaj

package.json

@@ -90,7 +90,7 @@
     "eslint-plugin-react": "^7.11.1",
     "jest": "^23.5.0",
     "jest-cli": "^23.5.0",
-    "less": "^3.7.1",
+    "less": "~3.7.1",
     "react": "^16.4.1",
     "react-dom": "^16.4.1",
     "react-test-renderer": "^16.4.1"

yarn.lock

@@ -1274,10 +1274,6 @@ cliui@^4.0.0:
     strip-ansi "^4.0.0"
     wrap-ansi "^2.0.0"
 
-clone@^2.1.2:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.2.tgz#1b7f4b9f591f1e8f83670401600345a02887435f"
-
 co@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
@@ -3137,11 +3133,9 @@ left-pad@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/left-pad/-/left-pad-1.3.0.tgz#5b8a3a7765dfe001261dde915589e782f8c94d1e"
 
-less@^3.7.1:
-  version "3.8.1"
-  resolved "https://registry.yarnpkg.com/less/-/less-3.8.1.tgz#f31758598ef5a1930dd4caefa9e4340641e71e1d"
-  dependencies:
-    clone "^2.1.2"
+less@~3.7.1:
+  version "3.7.1"
+  resolved "https://registry.yarnpkg.com/less/-/less-3.7.1.tgz#192e9dcef456ba3181a4e8d78a200f72a75e5c30"
   optionalDependencies:
     errno "^0.1.1"
     graceful-fs "^4.1.2"