Nu Release 0.13.0 and Recent Improvements

1st chunk of `blog/2020-04-24-twin0035.md`

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# This week in Nu #35

The 0.13.0 release!

- homburg added configurable key timeouts for rustyline (#1649)
- andrasio allowed more value types to be used as keys for grouping (#1648)
- siedentop added more docs for contributors (#1647) and users (#1645)
- jonathandturner fixed some stability issues with startup commands (#1642), released 0.13.0 (#1625), worked on semicolon and operators (#1601, #1606, #1613, #1620, #1622)
- quebin31 improved completions when there were multi-dot paths (#1640)
- pka made the default completion mode OS-dependent (#1636)
- BurNiinTRee fixed headerless logic in `to-csv` (#1635)
- casidiablo added a config option to disable the row number (#1623)
- thegedge and jonathandturner added support for passing var arguments to external commands (#1611, #1615)
- avandesa fixed some issues with locating executables (#1607, #1627)
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Title: Nu Release 0.13.0 and Recent Improvements

Summary

This week's Nu update highlights the 0.13.0 release and contributions from various developers. Key improvements include configurable key timeouts, expanded value types for grouping, enhanced documentation, stability fixes for startup commands, improved completions for multi-dot paths, OS-dependent completion modes, fixes for `to-csv`, a config option to disable row numbers, support for variable arguments in external commands, and fixes for executable location issues.