Release v0.9.0

New features

• Create package API for implementing MRP workflow in R scripts (#88)
• Allow selection of uncertainty intervals in estimate plots (API only) (#99)
• Allow conversion of dates to month and year indices (#100)

Bugfixes

• Fix non-character label of the button used for linking to ACS data (#87)
• Fix filtering of interactions for structured prior (#96)
• Prevent removal of 'date' column during data preprocessing (#97)

Other changes

• Create pkgdown website (#81)
• Change plot y-axis label and select input in "Visualize data" tab (#86)
• Package data are either serialized or store in a separate data repository (#89, #101)
• Move cmdstanr to "Suggests" dependencies (#105)