Changes in version 0.4.6                        

  - Add vignette on estimating phenotypic correlations.

                        Changes in version 0.4.5                        

  - Bump roxygen2 to 8.0.0 and add package level helpfile.

                        Changes in version 0.4.4                        

  - Implement some optimizations.

                        Changes in version 0.4.3                        

  - The snpcov_mvmr() function accidentally omitted intercepts from its
    regressions of exposure on genotype. This has been fixed.

                        Changes in version 0.4.2                        

  - The qhet_mvmr() function with argument CI = TRUE is now faster as it
    can use multiple processor cores (except on Windows) and it
    calculates the bootstrap confidence interval limits more efficiently
    as an unnecessarily repeated function call has been removed (thanks
    @nickhir).

                        Changes in version 0.4.1                        

  - We have slightly improved the speed of the phenocov_mvmr() function
    (thanks @shiyw).

  - In the phenocov_mvmr() function we renamed the Pcov argument to pcor
    to reflect that this is a correlation matrix. This matches the
    argument name in qhet_mvmr() (thanks @mooreann).