gnu: r-fdrtool: Update to 1.2.17.

* gnu/packages/statistics.scm (r-fdrtool): Update to 1.2.17.

gnu: r-car: Update to 3.0-12.

* gnu/packages/statistics.scm (r-car): Update to 3.0-12.
[propagated-inputs]: Remove r-rio.

gnu: r-nloptr: Update to 1.2.2.3.

* gnu/packages/statistics.scm (r-nloptr): Update to 1.2.2.3.

gnu: r-robust: Update to 0.6-1.

* gnu/packages/statistics.scm (r-robust): Update to 0.6-1.

gnu: r-mclust: Update to 5.4.8.

* gnu/packages/statistics.scm (r-mclust): Update to 5.4.8.

gnu: r-glmnet: Update to 4.1-3.

* gnu/packages/statistics.scm (r-glmnet): Update to 4.1-3.
[propagated-inputs]: Add r-rcpp and r-rcppeigen.

gnu: r-dt: Update to 0.20.

* gnu/packages/statistics.scm (r-dt): Update to 0.20.

gnu: r-snow: Update to 0.4-4.

* gnu/packages/statistics.scm (r-snow): Update to 0.4-4.

gnu: r-rcpparmadillo: Update to 0.10.7.3.0.

* gnu/packages/statistics.scm (r-rcpparmadillo): Update to 0.10.7.3.0.

gnu: r-readr: Update to 2.1.0.

* gnu/packages/statistics.scm (r-readr): Update to 2.1.0.

gnu: r-git2r: Update to 0.29.0.

* gnu/packages/statistics.scm (r-git2r): Update to 0.29.0.

gnu: r-backports: Update to 1.3.0.

* gnu/packages/statistics.scm (r-backports): Update to 1.3.0.

gnu: r-tibble: Update to 3.1.6.

* gnu/packages/statistics.scm (r-tibble): Update to 3.1.6.

gnu: r-crayon: Update to 1.4.2.

* gnu/packages/statistics.scm (r-crayon): Update to 1.4.2.

gnu: r-microbenchmark: Update to 1.4.9.

* gnu/packages/statistics.scm (r-microbenchmark): Update to 1.4.9.

gnu: statistics: Delete trailing whitespace.

* gnu/packages/statistics.scm: Delete trailing whitespace.

gnu: Add xlispstat.

* gnu/packages/statistics.scm (xlispstat): New variable.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu: Add r-desctools.

* gnu/packages/statistics.scm (r-desctools): New variable.

gnu: Add r-exact.

* gnu/packages/statistics.scm (r-exact): New variable.

gnu: Add r-gld.

* gnu/packages/statistics.scm (r-gld): New variable.