[R-pkgs] gsDesign 3.4.0 is released

[Nan Xiao]

Dear all,

A new version of gsDesign (3.4.0) is now on CRAN (https://cran.r-project.org/package=gsDesign). gsDesign supports group sequential clinical trial design, largely as presented in Jennison and Turnbull (2000).

This version removes restrictions on conditional power calculations for interim test statistic and brings improvements on dependencies and lifecycle management. Please see the changelog (https://keaven.github.io/gsDesign/news/) for details.

Thanks,
-Nan