gnu: r-curl: Update to 3.1.

* gnu/packages/web.scm (r-curl): Update to 3.1.

gnu: r-ade4: Update to 1.7-10.

* gnu/packages/statistics.scm (r-ade4): Update to 1.7-10.
[propagated-inputs]: Add r-mass.

gnu: r-registry: Update to 0.5.

* gnu/packages/statistics.scm (r-registry): Update to 0.5.

gnu: r-iterators: Update to 1.0.9.

* gnu/packages/statistics.scm (r-iterators): Update to 1.0.9.

gnu: r-segmented: Update to 0.5-3.0.

* gnu/packages/statistics.scm (r-segmented): Update to 0.5-3.0.

gnu: r-rprojroot: Update to 1.3-1.

* gnu/packages/statistics.scm (r-rprojroot): Update to 1.3-1.

gnu: r-rcpparmadillo: Update to 0.8.300.1.0.

* gnu/packages/statistics.scm (r-rcpparmadillo): Update to 0.8.300.1.0.

gnu: r-plotrix: Update to 3.7.

* gnu/packages/statistics.scm (r-plotrix): Update to 3.7.

gnu: r-git2r: Update to 0.20.0.

* gnu/packages/statistics.scm (r-git2r): Update to 0.20.0.

gnu: r-backports: Update to 1.1.2.

* gnu/packages/statistics.scm (r-backports): Update to 1.1.2.

gnu: r-yaml: Update to 2.1.16.

* gnu/packages/statistics.scm (r-yaml): Update to 2.1.16.

gnu: r-reshape2: Update to 1.4.3.

* gnu/packages/statistics.scm (r-reshape2): Update to 1.4.3.

gnu: r-digest: Update to 0.6.13.

* gnu/packages/statistics.scm (r-digest): Update to 0.6.13.

gnu: r-vcd: Update to 1.4-4.

* gnu/packages/cran.scm (r-vcd): Update to 1.4-4.

gnu: r-proxy: Update to 0.4-20.

* gnu/packages/cran.scm (r-proxy): Update to 0.4-20.

gnu: r-biomart: Update to 2.34.1.

* gnu/packages/bioinformatics.scm (r-biomart): Update to 2.34.1.
[propagated-inputs]: Add r-httr.

gnu: r-gviz: Update to 1.22.2.

* gnu/packages/bioinformatics.scm (r-gviz): Update to 1.22.2.

gnu: r-gqtlstats: Update to 1.10.1.

* gnu/packages/bioinformatics.scm (r-gqtlstats): Update to 1.10.1.

gnu: r-rtracklayer: Update to 1.38.2.

* gnu/packages/bioinformatics.scm (r-rtracklayer): Update to 1.38.2.

gnu: r-limma: Update to 3.34.4.

* gnu/packages/bioinformatics.scm (r-limma): Update to 3.34.4.