Upgraded Flow and Jest

Author: bvaughn

package.json

@@ -15,8 +15,8 @@
     "babel-plugin-transform-flow-strip-types": "^6.22.0",
     "babel-preset-latest": "^6.22.0",
     "cross-env": "^3.1.4",
-    "flow-bin": "^0.38.0",
-    "jest": "^18.1.0",
+    "flow-bin": "^0.50.0",
+    "jest": "^20.0.4",
     "rimraf": "^2.5.4",
     "uglify": "^0.1.5",
     "uglify-js": "^2.7.5",
@@ -57,7 +57,7 @@
   "homepage": "https://github.com/bvaughn/js-search",
   "jest": {
     "setupFiles": [],
-    "testPathDirs": [
+    "roots": [
       "./source"
     ],
     "testRegex": "\\.test\\.js$",