Nu Shell Updates - Week #41

1st chunk of `blog/2020-06-05-twin0041.md`

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# This week in Nu #41

- andrasio brought back `parse` as a [built-in command](https://github.com/nushell/nushell/pull/1938), and improved `average` [to support tables](https://github.com/nushell/nushell/pull/1918)
- jonathandturner bumped Nu to the [latest rustyline](https://github.com/nushell/nushell/pull/1937), [more deps](https://github.com/nushell/nushell/pull/1921), and [more deps](https://github.com/nushell/nushell/pull/1920). Also moved [commands off of async_stream!](https://github.com/nushell/nushell/pull/1919) ( [2](https://github.com/nushell/nushell/pull/1917) [3](https://github.com/nushell/nushell/pull/1916) )
- JosephTLyons moved another batch of commands [off the async_stream! macro](https://github.com/nushell/nushell/pull/1934)
- fdncred moved the `no_auto_pivot` setting [into `pivot_mode`](https://github.com/nushell/nushell/pull/1931)
- utam0k refactoring our [flag help printout](https://github.com/nushell/nushell/pull/1930), updated our [docker workflow](https://github.com/nushell/nushell/pull/1924)
- routrohan moved `str to-float` [to `str to-decimal`](https://github.com/nushell/nushell/pull/1926)
- johnae updated [the lockfile](https://github.com/nushell/nushell/pull/1923)
- he4d added [login to `fetch`](https://github.com/nushell/nushell/pull/1915)

Title: Nu Shell Updates - Week #41

Summary

This week's updates to the Nu shell include the return of `parse` as a built-in command, improvements to `average`, updates to dependencies, removal of async_stream! macro, refactoring of flag help printout, and moving `str to-float` to `str to-decimal`.