updated dependencies, re-created wrapper.

This commit changes the build.gradle to have newer released versions, not beta or alpha, of the dependencies. It also has the updated gradle wrapper.

All that was done was this:
1. clone the repository
2. update the build.gradle from [this](https://gist.github.com/kentoj/42e9d623d35f53a89d75) gist.
3. run `gradle wrapper`
4. run `gradle build`
5. run `gradle clean`
6. run `./gradlew build`