v0.2.2-rc1

What's Changed

• 94: convert character to factor in cov strat score fun by @danielinteractive in #95
• Change from sp to sr by @danielinteractive in #98
• 96: optionally disable HR estimation by @danielinteractive in #99
• 71: Improve survival model user interface by @danielinteractive in #102
• 103: Joint design matrix creation for stratified survival by @danielinteractive in #104
• 93: Improve print method for surv_effect objects by @danielinteractive in #105
• 97: robin_surv warns when randomization strata inadequately included in model by @danielinteractive in #106
• fix robin_lm issue by @clarkliming in #101

Full Changelog: v0.2.1-rc1...v0.2.2-rc1