Fix Issue #34: Testing 'Internal Server Error (500)'

[Starli0n]

PHPUnit Ok!

PHPUnit 5.5.2 by Sebastian Bergmann and contributors.

..................                                                18 / 18 (100%)

Time: 266 ms, Memory: 10.00MB

OK (18 tests, 34 assertions)

[Starli0n]

Sorry I was too hasty and I forgot to add some unit tests.

I will do it next week. Anyway the Travis tests failed.

[Starli0n]

I had to change the lowest version of Slim (~3.1) as the process() method did not exist before.

[Starli0n]

Is it Ok for you now?

[craig-davis]

@Starli0n I am very sorry that this was not merged in a timely manner. We need to give this project some love and attention. I'm going to add you as a contributor as well.

[Starli0n]

Thank you for adding me as contributor.
I really appreciate it :-)

[craig-davis]

@Starli0n Thank you for contributing!

Next on my list it to get this upgraded to phpunit 6. I've been short on time lately, but it's a goal.