fix: langs is not iterable error

[teyou]

Issue #5

Checklist

• I have ensured my pull request is not behind the main or master branch of the original repository.
• I have rebased all commits where necessary so that reviewing this pull request can be done without having to merge it first.
• I have written a commit message that passes commitlint linting.
• I have ensured that my code changes pass linting tests.
• I have ensured that my code changes pass unit tests.
• I have described my pull request and the reasons for code changes along with context if necessary.

[teyou]

@titanism FYI

[teyou]

@titanism could you please help check this PR? thanks

[titanism]

v1.0.3 released to npm (this closes #5)

thanks for your PR @teyou 🙇

v1.0.3 released to npm (this closes #5)

thanks for your PR @teyou 🙇

https://github.com/ladjs/country-language/releases/tag/v1.0.3