Upgrade jest, jest-config, jest-validate to 24

Author: palmerj3

.gitignore

@@ -1,3 +1,2 @@
 node_modules
-yarn.lock
 junit.xml

.travis.yml

@@ -7,5 +7,6 @@ node_js:
 env:
   - JEST_VERSION=^22.0.0
   - JEST_VERSION=^23.0.0
+  - JEST_VERSION=^24.0.0
 script:
   - npm run test:ci

package.json

@@ -16,18 +16,18 @@
   ],
   "scripts": {
     "test": "jest",
-    "pretest:ci": "npm install jest@$JEST_VERSION --no-save",
+    "pretest:ci": "npm uninstall jest && npm install jest@$JEST_VERSION --no-save",
     "test:ci": "jest --ci"
   },
   "dependencies": {
-    "jest-config": "^23.6.0",
-    "jest-validate": "^23.0.1",
+    "jest-config": "^24.0.0",
+    "jest-validate": "^24.0.0",
     "mkdirp": "^0.5.1",
     "strip-ansi": "^4.0.0",
     "xml": "^1.0.1"
   },
   "devDependencies": {
-    "jest": "^22.4.3",
+    "jest": "^24.0.0",
     "libxmljs": "^0.18.4"
   }
 }