shells/nushell: update to 0.70.0

Themes of this release:

- New table flags
  --expand: changes a standard table view; expand the table structure so
  internally all data will be displayed as inner tables

- NOTICE
  The expand mode can be considered generally slower than a base table view.
  So, if you have a large data set it may be slow.
    --expand-deep {int}: set a limit after which table enlargement is stopped
    --flatten: an --expand view option to return a set of values instead of
      table for a simple lists
    --flatten-separator {char}: a configuration of a separator for --flatten
    --collapse: changes a standard table view; expand the table structure in a
      squashed way

- NOTICE
  collapse mode currently doesn't support width control, therefore if your
  terminal is not wide enough the table might be broken. The collapse mode can
  be considered generally slower than a base table view. So, if you have a
  large data set it may be slow.

- Breaking changes
  The command first 1 now returns a list with the single value rather than the
  value itself. This brings it in line with the behaviour of last 1.
  The dataframe command with-sql or query dfr has been renamed to query df for
  consistency.

- Next Steps
  We're continuing to work on language updates and hope to have more
  information for you soon.

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