gnu: nushell: Update to 0.29.0.

gnu: nushell: Update to 0.29.0.

* gnu/packages/shells.scm (nushell): Update to 0.29.0.
(rust-nu-ansi-term-0.29):
(rust-nu-cli-0.29):
(rust-nu-command-0.29):
(rust-nu-data-0.29):
(rust-nu-engine-0.29):
(rust-nu-json-0.29):
(rust-nu-parser-0.29):
(rust-nu-plugin-0.29):
(rust-nu-plugin-binaryview-0.29):
(rust-nu-plugin-chart-0.29):
(rust-nu-plugin-fetch-0.29):
(rust-nu-plugin-from-bson-0.29):
(rust-nu-plugin-from-sqlite-0.29):
(rust-nu-plugin-inc-0.29):
(rust-nu-plugin-match-0.29):
(rust-nu-plugin-post-0.29):
(rust-nu-plugin-ps-0.29):
(rust-nu-plugin-s3-0.29):
(rust-nu-plugin-sys-0.29):
(rust-nu-plugin-textview-0.29):
(rust-nu-plugin-to-bson-0.29):
(rust-nu-plugin-to-sqlite-0.29):
(rust-nu-plugin-tree-0.29):
(rust-nu-plugin-xpath-0.29):
(rust-nu-protocol-0.29):
(rust-nu-source-0.29):
(rust-nu-stream-0.29):
(rust-nu-test-support-0.29):
(rust-nu-value-ext-0.29): Update to 0.29.