v2.6.0

[joethorley]

# ssdtools 2.6.0

- Changed from `min_pboot = 0.95` to `min_pboot = 0.8` to be consistent with shinyssdtools.
- Added `rescale = FALSE` and `silent = FALSE` arguments to `ssd_fit_bcanz()`.
- Added `proportion = c(0.01, 0.05, 0.1, 0.2)` to `ssd_hc_bcanz()` and `average = TRUE` and `ci = FALSE` arguments to `ssd_hc_bcanz()` and `ssd_hp_bcanz()`.
- Added `est_method = "multi"` to `ssd_plot_cdf()`.