feat: support traversing non-defined type fields

[danielkrainas]

Adds support for traversing non-defined type fields

type T struct {
  NonDefinedField struct {
    Foo string `env:"T_FOO"`
  }
}

[ghost]

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[codecov]

Codecov Report

Merging #96 into master will decrease coverage by 0.87%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #96      +/-   ##
==========================================
- Coverage     100%   99.12%   -0.88%     
==========================================
  Files           1        1              
  Lines         223      228       +5     
==========================================
+ Hits          223      226       +3     
- Misses          0        1       +1     
- Partials        0        1       +1

Impacted Files	Coverage Δ
env.go	99.12% <100%> (-0.88%)	⬇️

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[caarlos0]

hey, thanks for the PR!

mind to add tests as well?

[ghost]

There were the following issues with this Pull Request

• Commit: 9512dc7
  • ✖ message may not be empty
  • ✖ type may not be empty

You may need to change the commit messages to comply with the repository contributing guidelines.

---

🤖 This comment was generated by commitlint[bot]. Please report issues here.

Happy coding!

[caarlos0]

Thanks!