0.9.54

• allow date-times to be used in strip charts
• automated testing of imports with mamba/github actions
• allow fractional scale bars.
• use the tabbed window to better organize image configuration.
• on macOS: remove allow idle and always force "DisplayIsAvailable" to avoid needing python.app with conda-based Python.
• avoid showing both left/right tickmarks when using side='right'
• fix several deprecations from matplotlib