Run 'gradle wrapper'; build fails with old wrapper

````
FAILURE: Build failed with an exception.

* Where:
Build file '/home/faux/code/jersey-pico/build.gradle' line: 157

* What went wrong:
A problem occurred evaluating root project 'jersey-pico'.
> 7

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 2.844 secs
./gradlew tasks  14.80s user 0.25s system 291% cpu 5.166 total
````