Fix generation with generic types

[jmattheis]

Fixes #66

[codecov[bot]]

Codecov Report

Patch coverage: 93.18% and project coverage change: -0.05 :warning:

Comparison is base (cf5677a) 96.45% compared to head (064f31b) 96.41%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #67 +/- ## ========================================== - Coverage 96.45% 96.41% -0.05% ========================================== Files 24 24 Lines 1497 1508 +11 ========================================== + Hits 1444 1454 +10 Misses 34 34 - Partials 19 20 +1 ``` | [Impacted Files](https://codecov.io/gh/jmattheis/goverter/pull/67?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jannis+Mattheis) | Coverage Δ | | |---|---|---| | [xtype/type.go](https://codecov.io/gh/jmattheis/goverter/pull/67?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jannis+Mattheis#diff-eHR5cGUvdHlwZS5nbw==) | `93.10% <93.18%> (-0.13%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jannis+Mattheis). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jannis+Mattheis)

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