v0.17.0

Adds

• axisFormat on SeriesChart (defaults to format) for the guide, zero and level labels.
• carriedIndex in the chart helpers.

Changes

• A loading Button stays enabled and keeps focus: aria-disabled and aria-busy instead of native disabled, and presses are ignored, so a submit cannot repeat. disabled stays native.
• SeriesChart keeps an inspected point through live ticks, by timestamp.
• SeriesChart no longer reads its hint aloud on every tick; only inspection content is a live region.
• The markers hint says "Select a marker to see the trade".