Deprecation: foreach: loop index implicitly converted from size_t to int

[BoQsc]

Well all these proposals to `int` index like `size_t` and `const 
typeof(arr.length)` are cryptic and less readable and less 
straightforward in comparison to how it used to be. Feels like 
horrible decision if the language is suppose to be somewhat 
futureproof. The `int` was simple, straighforward and great. 
These suggestions feel like some `C++` all over again.