fix: path separator on windows

[ggurkal]

Closes #486

[vercel[bot]]

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Name	Status	Preview	Updated
next-api-decorators	✅ Ready (Inspect)	Visit Preview	Oct 20, 2022 at 3:43PM (UTC)

[codecov[bot]]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage :thumbsup:

Coverage data is based on head (89cf473) compared to base (1a0c2f9). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## beta #488 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 46 46 Lines 596 596 Branches 172 158 -14 ========================================= Hits 596 596 ``` | [Impacted Files](https://codecov.io/gh/instantcommerce/next-api-decorators/pull/488?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=instantcommerce) | Coverage Δ | | |---|---|---| | [lib/internals/getCallerInfo.ts](https://codecov.io/gh/instantcommerce/next-api-decorators/pull/488/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=instantcommerce#diff-bGliL2ludGVybmFscy9nZXRDYWxsZXJJbmZvLnRz) | `100.00% <100.00%> (ø)` | | 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=instantcommerce). 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=instantcommerce)

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[github-actions[bot]]

:tada: This PR is included in version 2.0.1-beta.2 :tada:

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket:

[github-actions[bot]]

:tada: This PR is included in version 2.0.1 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: