# tcl 1.0.1
- mix_mod() added: fits a mixed model considering multiple covariates.
- Power calculation and power curve functions added for statistical analysis and visualization.
- Backtick issues in sample_size_planning outputs fixed for improved readability.
- Function arguments and return values harmonized across the package for consistency and ease of use.

# tcl 0.2.1
- minor bug fixes

# tcl 0.2.0

- function "Testing item discriminations" added
- invar_test() function update: RS test statistic computable, in case Group 1 and/or 2 model not identified from the data.
- minor bug fixes

# tcl 0.1.1

- functions for power and sample size computations are added
- minor bug fixes

# tcl 0.1.0

First CRAN release.
