Nu Shell Updates - Week #78

1st chunk of `blog/2021-02-19-twin0078.md`

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# This week in Nu #78

- WatsonThink added [tilde support to `source`](https://github.com/nushell/nushell/pull/3059)
- rezural added [terminal height to the internal host information](https://github.com/nushell/nushell/pull/3064)
- fdncred improved the [`table` test app](https://github.com/nushell/nushell/pull/3065), improved [the help text](https://github.com/nushell/nushell/pull/3054)
- stormasm also improved the [`table` test app](https://github.com/nushell/nushell/pull/3067)
- LhKipp updated the [default config](https://github.com/nushell/nushell/pull/3069)
- ahkrr also updated the [default config](https://github.com/nushell/nushell/pull/3060)
- andrasio fixed the [PATH bug that slipped into 0.27.0](https://github.com/nushell/nushell/pull/3072), improved the [tests for .nu-env](https://github.com/nushell/nushell/pull/3078)
- jonathandturner added [column truncation](https://github.com/nushell/nushell/pull/3061), released [0.27](https://github.com/nushell/nushell/pull/3063), released [0.27.1](https://github.com/nushell/nushell/pull/3073), fixed [`let-env`](https://github.com/nushell/nushell/pull/3057), fixed [error on external prompts on startup](https://github.com/nushell/nushell/pull/3056)
- ilius fixed some [parsing issues with matching brackets](https://github.com/nushell/nushell/pull/3053)
- watzon updated [the README](https://github.com/nushell/nushell/pull/3052)

Title: Nu Shell Updates - Week #78

Summary

This week's updates to the Nu shell include tilde support for 'source', terminal height information, improvements to the 'table' test app and help text, updates to the default config, a fix for a PATH bug introduced in 0.27.0, column truncation, releases of versions 0.27 and 0.27.1, fixes for 'let-env' and startup errors, parsing fixes, and updates to the README.