[Iterators] should support empty collections

[github-actions]

[Iterators] should support empty collections
right now, if we do e.g. loop [] 'x [], it will crash.
the same happens with empty dictionaries. This is a total mess, since
we'd have to check if the given array/dictionary is empty? beforehand.
This has to be prioritized!

arturo/src/library/Iterators.nim

Line 19 in ab16110

# TODO(Iterators) should support empty collections

#  labels: library, enhancement

# TODO(Iterators) should support empty collections
#  right now, if we do e.g. `loop [] 'x []`, it will crash.
#  the same happens with empty dictionaries. This is a total mess, since
#  we'd have to check if the given array/dictionary is `empty?` beforehand.
#  This has to be prioritized!
#  labels: library, bug, critical, :block, :dictionary

#=======================================
# Pragmas
#=======================================

1e0b8c3a97890cbef52b10511e49482622ea5d56