flatten-array: update tests to v1.1.0

[AiryShift]

Old tests that aren't part of v1.1.0 were moved to the end
Resolves #995

[cmccandless]

@AiryShift Thanks for your pull request! Magic words only work in included in the PR description, not in comments. Please edit the description to include "Resolves #995".

[AiryShift]

Apologies for not doing that earlier. Should be fixed now,

[ilya-khadykin]

@AiryShift there is a style issue in your changes:

2.83s$ flake8
./exercises/flatten-array/flatten_array_test.py:7:1: E302 expected 2 blank lines, found 1

The command "flake8" failed and exited with 1 during .
Your build has been stopped.

[N-Parsons]

Thanks @AiryShift!