Add float precision flag.

[jreeter]

Adds floating flag to return higher precision week day counts.

[jamesplease]

Thanks @jreeter ! Would you mind adding new tests to verify that this produces the expected results? The “hole” utilities that I wrote only have tests assuming integers, so I’m a little bit wary of whether they can handle non-integer inputs.

[jreeter]

Yea, I'll see about adding tests and documentation to the API. Seem to be getting some weird test error when running npm run test:

[14:52:30] 'test' errored after 30 ms
[14:52:30] AssertionError: true === false
    at Def.Dp.bases (/Users/josh/dev/moment-business/node_modules/ast-types/lib/types.js:408:12)
    at Object.<anonymous> (/Users/josh/dev/moment-business/node_modules/6to5/lib/6to5/patch.js:18:4)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at Object.<anonymous> (/Users/josh/dev/moment-business/node_modules/6to5/lib/6to5/util.js:3:1)
    at Module._compile (module.js:413:34)

I'll try to look into this as well.

[jamesplease]

Thanks. This library is very old, so CI is building it on Node 0.10. If you're using a node version manager, the simplest approach may just be developing on Node 0.10. If you separately want to update the build system to support a newer Node, by all means, go for it! But I'd prefer if we do that separately from adding this new functionality in.

Thanks for taking the time to improve this library!

[jamesplease]

I'm going to close this PR due to inactivity. If there's still interest in this feature, just leave me a note and we can definitely continue the conversation.