[Tests] create-react-class should be a static dev dependency.

Author: ljharb

package.json

@@ -20,7 +20,7 @@
     "test:karma": "karma start",
     "test:env": "sh ./example-test.sh",
     "test:all": "npm run react:13 && npm run test:only && npm run react:14 && npm run test:only && npm run react:15.4 && npm run test:only && npm run react:15 && npm run test:only",
-    "react:clean": "rimraf node_modules/react node_modules/react-dom node_modules/react-addons-test-utils node_modules/create-react-class node_modules/react-test-renderer",
+    "react:clean": "rimraf node_modules/react node_modules/react-dom node_modules/react-addons-test-utils node_modules/react-test-renderer",
     "react:13": "rimraf node_modules/.bin/npm && npm run react:clean && npm i [email protected] && npm install",
     "react:14": "rimraf node_modules/.bin/npm && npm run react:clean && npm i [email protected] [email protected] [email protected] && npm install",
     "react:15.4": "rimraf node_modules/.bin/npm && npm run react:clean && npm i [email protected] [email protected] [email protected] && npm install",
@@ -73,6 +73,7 @@
     "babel-register": "^6.24.1",
     "chai": "^3.5.0",
     "coveralls": "^2.13.0",
+    "create-react-class": "^15.5.2",
     "enzyme-example-jest": "^0.1.0",
     "enzyme-example-karma": "^0.1.1",
     "enzyme-example-karma-webpack": "^0.1.4",