This library is supposed to be used within tests as it provides general
non-generic information and utilities, like project root and such.

We don't want to format files inside testfiles.

This library deals with evaluating and validating the configuration
based on the module spec and runtime value.

It also exposes a function for evaluating docs, which is not implemented yet.

This allows for mapping subsequent arrays into their inside values.

e.g.
```lua
iter.map(
  {
    { { foo = 1} }
  },
  1,
  'foo'
) ==  { 1 }
```