Make tests file have executable permissions

[bartbes]

Hopefully fixes the error you're getting with CI.

[Yonaba]

Awesome. Thanks, @bartbes,

Actually, It works fine, as you can see here. Though, the tests fails with Lua 5.2, because setfenv (line 121) is deprecated.
Well, I can either updated the .travis.yml to skip building for Lua 5.2.
Or are you willing to update Class-Commons tests specification to support Lua 5.2 ? In that case, you might need a replacement for setfenv... Maybe this might help.

[bartbes]

It probably makes sense to revise the tests in general and possibly move to a well-known (but small?) testing library. That said, I think setfenv isn't strictly necessary in the current codebase.

[Yonaba]

Hmm, I see.
Concerning a possible test library, I am very used to Telescope. It is really fine, and light enough, to me. There's also busted, which has much more features, and also easy to use. But I'd go with Telescope. I can rewrite Class-Commons codebase with Telescope and send a PR.
Maybe this should be discussed in a separate issue on Class-Commons repository itself, since it will affect everyone using Class-Commons (I mean @kikito's MiddleClass, @vrld's Hump.class and Slither).

[bartbes]

Class Commons Tests repo ticket opened: bartbes/Class-Commons-Tests#2