Use jest for testing

Thanks to @paularmstrong:
https://github.com/necolas/react-native-web/pull/249

package.json

@@ -14,8 +14,8 @@
     "examples": "start-storybook -p 9001 -c ./examples/.storybook --dont-track",
     "lint": "eslint src",
     "prepublish": "npm run build && npm run build:umd",
-    "test": "karma start karma.config.js",
-    "test:watch": "npm run test -- --no-single-run"
+    "test": "jest",
+    "test:watch": "npm run test -- --watch"
   },
   "dependencies": {
     "animated": "^0.1.3",
@@ -23,7 +23,7 @@
     "fbjs": "^0.8.4",
     "inline-style-prefixer": "^2.0.1",
     "lodash": "^4.15.0",
-    "react-dom": "^15.3.1",
+    "react-dom": "^15.3.2",
     "react-textarea-autosize": "^4.0.4",
     "react-timer-mixin": "^0.13.3"
   },
@@ -41,23 +41,16 @@
     "eslint-plugin-promise": "^2.0.1",
     "eslint-plugin-react": "^6.1.2",
     "file-loader": "^0.9.0",
-    "karma": "^1.2.0",
-    "karma-browserstack-launcher": "^1.0.1",
-    "karma-chrome-launcher": "^2.0.0",
-    "karma-firefox-launcher": "^1.0.0",
-    "karma-mocha": "^1.1.1",
-    "karma-mocha-reporter": "^2.1.0",
-    "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^1.8.0",
-    "mocha": "^3.0.2",
+    "jest": "^16.0.2",
     "node-libs-browser": "^0.5.3",
-    "react": "^15.3.1",
-    "react-addons-test-utils": "^15.3.1",
+    "react": "^15.3.2",
+    "react-addons-test-utils": "^15.3.2",
+    "react-test-renderer": "^15.3.2",
     "url-loader": "^0.5.7",
     "webpack": "^1.13.2"
   },
   "peerDependencies": {
-    "react": "^15.3.1"
+    "react": "^15.3.2"
   },
   "author": "Nicolas Gallagher",
   "license": "BSD-3-Clause",
@@ -73,5 +66,9 @@
     "react-component",
     "react-native",
     "web"
-  ]
+  ],
+  "jest": {
+    "testEnvironment": "jsdom",
+    "timers": "fake"
+  }
 }