feat: add Base64 type support

[itpropro]

🔗 Linked issue

#6

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Added Base64 and Base64Url types. There are exclusions in the tests, as both Base64 types cannot autodetected, as they are semantically overlapping with string. Therefore a new optional parameter for convertTo was introduced to overwrite the autodetection for the fromType.
This was the best way I found to keep the tests simple and to change as least of the api exposure as possible. Detection of the types is still implemented, but explicitly not integrated in detectType due to the detection overlap with string mentioned above.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Welcome to Codecov 🎉

Once you merge this PR into your default branch, you're all set! Codecov will compare coverage reports and display results in all future pull requests.

Thanks for integrating Codecov - We've got you covered ☂️

[itpropro]

If #9 is fine by you @pi0, I will adjust this one accordingly.

[pi0]

Hi @itpropro thanks for PR ❤️

I have played little bit locally and merged url-safe version as an optional option of urlSafe to all methods this ways we can keep number of exposed mappers and functions minimal.

Merging this but later add more tests to make sure all utils works as expected.

[itpropro]

Hi @itpropro thanks for PR ❤️

I have played little bit locally and merged url-safe version as an optional option of urlSafe to all methods this ways we can keep number of exposed mappers and functions minimal.

Merging this but later add more tests to make sure all utils works as expected.

I tried to stay as close to the other exposed interfaces and therefore created a separate url type to avoid additional tests and parameters as non of the others had them. The urlSafe option is actually how the initial version looked, so I like this change :)