Number sort type does not handle negative values

[amy-mac]

Describe the bug (required)
A new number sort function was added to sortTypes to handle numbers since the default alphanumeric sort type does not handle floats. However, the number sort function does not handle negative numbers and treats the negative number the same way as its positive counterpart because the numbers are converted to strings that then get stripped of the negative sign with this regex

Provide an example via Codesandbox! (required)
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Steps To Reproduce (required)
Steps to reproduce the behavior:

1. Have a column that has "number" as its sortType
2. Have values in the cell that are negative as well as positive
3. Try to sort
4. See error

Expected behavior (Recommended)
I would expect a sorting function that handles numbers to be able to sort negative numbers as lower values than positive numbers.

[Jeffdude]

Ensure the value returned by the accessor is a Number type, then use sortType: 'basic'

Fixed docs in #3359

[github-actions]

This issue is being marked as stale (no activity in the last 14 days)

[github-actions]

This issue has been detected as stale and automatically closed. It's very likely that your issue has remained here this long because it would require breaking changes to v7. React Table v8 is currently in alpha (soon beta!) and already contains bug fixes, performance improvements and architectural changes that likely address this issue.

• If your v7 issue has been previously labeled as requiring breaking changes, please try the new v8 alpha/beta releases
• If your v7 issue has not already been labeled as a breaking change, open a new issue.
• If this was a v8 issue and was closed by mistake, please reopen or leave a comment below.