v4.0.0

What's Changed

• Hold a RowCol to a row and a column a sheet has (#55) @jafin
• Write a plain #REF! for a deleted sheet, and let a modification narrow a 3D reference (#54) @jafin
• Refuse the formulas that ran the stack out, and tidy what the sweep turned up (#50) @jafin

Breaking Changes

• Drop netstandard2.0 and netstandard2.1, target net8.0 (#56) @jafin

New Features

• Drop netstandard2.0 and netstandard2.1, target net8.0 (#56) @jafin

Performance

• perf: unescape a doubled apostrophe in one pass (#58) @jafin

Documentation

• docs: add the v3.1.0 summary paragraph (#49) @jafin

Thanks to @jafin for contributing to this release.