Works on my 18.0.1.

Hello Mr gitpan (?),
I just changed the test #36 because it was indirect relying on the order of   `keys %$map`
I also added a META.json build from the Makefile and added information about this repository that it could be found from metacpan.

this is my first pull request, please tell me if i did something wrong. 
Greetings,
patjs