Windows support

[birdsarah]

Fixes #2

Checklist:

• Used a fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

I'm not an expert at conda recipes, but this looks relatively easy now cmake support is available and I'd like to be able use the package on windows.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• License is not an SPDX identifier (or a custom LicenseRef) nor an SPDX license expression.

[xhochy]

@birdsarah Don't manually touch the files in .ci_support. They are auto-generated you can either update them locally using conda smithy rerender or kindly ask our bot to do this:

@conda-forge-admin please rerender

[xhochy]

Thanks @birdsarah!

[birdsarah]

@birdsarah Don't manually touch the files in .ci_support. They are auto-generated you can either update them locally using conda smithy rerender or kindly ask our bot to do this.

@xhochy - sorry about that i hadn't figured out how to do it.