Update prettier's prettier to 1.9.2

package.json

@@ -66,7 +66,7 @@
     "eslint-plugin-react": "7.1.0",
     "jest": "21.1.0",
     "mkdirp": "0.5.1",
-    "prettier": "1.9.1",
+    "prettier": "1.9.2",
     "prettylint": "1.0.0",
     "rimraf": "2.6.2",
     "rollup": "0.41.6",

yarn.lock

@@ -3490,9 +3490,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.9.1:
-  version "1.9.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.9.1.tgz#41638a0d47c1efbd1b7d5a742aaa5548eab86d70"
+prettier@1.9.2:
+  version "1.9.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.9.2.tgz#96bc2132f7a32338e6078aeb29727178c6335827"
 
 pretty-format@^21.1.0:
   version "21.1.0"