gnu: r-xml: Update to 3.98-1.5.

* gnu/packages/statistics.scm (r-xml): Update to 3.98-1.5.
[propagated-inputs]: Remove r-rcurl.

gnu: r-sparsem: Update to 1.74.

* gnu/packages/statistics.scm (r-sparsem): Update to 1.74.

gnu: r-data-table: Update to 1.10.0.

* gnu/packages/statistics.scm (r-data-table): Update to 1.10.0.
[propagated-inputs]: Remove r-chron.

gnu: r-estimability: Update to 1.2.

* gnu/packages/statistics.scm (r-estimability): Update to 1.2.

gnu: r-rcpp: Update to 0.12.8.

* gnu/packages/statistics.scm (r-rcpp): Update to 0.12.8.

gnu: r-yaml: Update to 2.1.14.

* gnu/packages/statistics.scm (r-yaml): Update to 2.1.14.

gnu: r-htmlwidgets: Update to 0.8.

* gnu/packages/web.scm (r-htmlwidgets): Update to 0.8.

gnu: r-curl: Update to 2.3.

* gnu/packages/web.scm (r-curl): Update to 2.3.

gnu: r-servr: Update to 0.5.

* gnu/packages/web.scm (r-servr): Update to 0.5.

Remove Emacs interface.

* emacs/guix-about.el: Remove file.
* emacs/guix-backend.el: Likewise.
* emacs/guix-base.el: Likewise.
* emacs/guix-buffer.el: Likewise.
* emacs/guix-build-log.el: Likewise.
* emacs/guix-command.el: Likewise.
* emacs/guix-config.el.in: Likewise.
* emacs/guix-devel.el: Likewise.
* emacs/guix-entry.el: Likewise.
* emacs/guix-external.el: Likewise.
* emacs/guix-geiser.el: Likewise.
* emacs/guix-guile.el: Likewise.
* emacs/guix-help-vars.el: Likewise.
* emacs/guix-helper.scm.in: Likewise.
* emacs/guix-history.el: Likewise.
* emacs/guix-hydra-build.el: Likewise.
* emacs/guix-hydra-jobset.el: Likewise.
* emacs/guix-hydra.el: Likewise.
* emacs/guix-info.el: Likewise.
* emacs/guix-init.el: Likewise.
* emacs/guix-license.el: Likewise.
* emacs/guix-list.el: Likewise.
* emacs/guix-location.el: Likewise.
* emacs/guix-main.scm: Likewise.
* emacs/guix-messages.el: Likewise.
* emacs/guix-pcomplete.el: Likewise.
* emacs/guix-popup.el: Likewise.
* emacs/guix-prettify.el: Likewise.
* emacs/guix-profiles.el: Likewise.
* emacs/guix-read.el: Likewise.
* emacs/guix-ui-generation.el: Likewise.
* emacs/guix-ui-license.el: Likewise.
* emacs/guix-ui-location.el: Likewise.
* emacs/guix-ui-package.el: Likewise.
* emacs/guix-ui-system-generation.el: Likewise.
* emacs/guix-ui.el: Likewise.
* emacs/guix-utils.el: Likewise.
* emacs/local.mk: Likewise.
* doc/emacs.texi: Likewise.
* doc/guix.texi: Remove cross-references to Emacs nodes.
(Package Management): Mention 'emacs-guix' package.
* doc/contributing.texi (The Perfect Setup): Remove the reference.
* doc/htmlxref.cnf: Add 'emacs-guix' URL.
* Makefile.am: Remove Emacs stuff.
* configure.ac: Likewise.
* gnu/packages/package-management.scm (guix-0.12.0)[native-inputs]:
Remove "emacs".
[propagated-inputs]: Remove "geiser" and "emacs-magit-popup".

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

gnu: r-colorspace: Update to 1.3-2.

* gnu/packages/statistics.scm (r-colorspace): Update to 1.3-2.

gnu: Add r-statmod.

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

gnu: Add r-ggbeeswarm.

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

gnu: Add r-sourcetools.

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

gnu: Add r-beeswarm.

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

gnu: Add r-vipor.

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

gnu: libpng-1.2: Update to 1.2.57 [security update].

* gnu/packages/image.scm (libpng-1.2): Update to 1.2.57.
[replacement]: New field.

gnu: libpng: Fix a null pointer dereference [fixes security issue].

* gnu/packages/patches/libpng-fix-null-ptr-dereference.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/image.scm (libpng)[replacement]: New field.
(libpng/fixed): New variable.

gnu: mpd: Update to 0.19.21.

* gnu/packages/mpd.scm (mpd): Update to 0.19.21.

gnu: rustc: Update to 1.14.0.

* gnu/packages/rust.scm (rustc): Update to 1.14.0.
  %rust-bootstrap-binaries: Update to 1.13.0.

Signed-off-by: David Craven <david@craven.ch>