Implement sv (Swedish/Sweden) for Number to Word

[haf]

Here is a checklist you should tick through before submitting a pull request:

• Implementation is clean
• Code adheres to the existing coding standards; e.g. no curlies for one-line blocks, no redundant empty lines between methods or code blocks, spaces rather than tabs, etc.
• No ReSharper warnings
• There is proper unit test coverage
• If the code is copied from StackOverflow (or a blog or OSS) full disclosure is included. That includes required license files and/or file headers explaining where the code came from with proper attribution
• There are very few or no comments (because comments shouldn't be needed if you write clean code — this justification is wrong, they are still needed. Perhaps you've never worked with someone who's articulate.)
• Xml documentation is added/updated for the addition/change — not really
• Your PR is (re)based on top of the latest commits from the dev branch (more info below) — there's no dev branch in origin.
• Link to the issue(s) you're fixing from your PR description. Use fixes #<the issue number>
• Readme is updated if you change an existing feature or add a new one — not applicable
• Run either build.cmd or build.ps1 and ensure there are no test failures — no can do, I'm on macOS

Fixes #857

[dnfclas]

All CLA requirements met.

[clairernovotny]

Thanks!

[haf]

You're welcome!

[haf]

When do you think you can release this as a nuget?

[clairernovotny]

2.7.9 is rolling out to NuGet now...probably 15 min to an hour for NuGet "indexing" for it to show up.

[haf]

Sweet! 🧨