Release v4.18.1

Added

• Every business template preview in both blueprints is audited with axe-core's WCAG 2.0 and 2.1 A and AA rules, in the populated, empty, loading and error states for the default blueprint. A control spec proves the audit reports a violation when there is one. Colour contrast and landmark rules need a real layout and are documented as not asserted. See The template set. (part of #73)

Fixed

• The PrimeReact data table states a column's sort order with aria-sort on the column header instead of on the sort button, where it is not allowed. (part of #73)
• The PrimeReact progress bar has an accessible name: its label property, or Progress. The dashboard template's capacity bar is labeled Warehouse capacity. (part of #73)