Adds myself to the maintainers list
Minor modifications of some ocaml packages:

adds myself as a maintainer
adds assertions to have evaluation errors rather than build errors
moves opam out of ocamlPackages, as it does not provide a library
Merge pull request #4189 from vbgl/maintainer

Adds myself as a maintainer
Fixed error with loading svg in roxterm.

Wrapped the GDK_PIXBUF_MODULE_FILE envvar so that roxterm is able to
load svg files.
Add myself to the maintainers of roxterm.
Merge pull request #4191 from cdepillabout/roxterm

Roxterm
ideas: refactored products into common subexpression.

Closes #4039
Merge pull request #4190 from joachifm/haskell-libmpd_0_9

haskell-libmpd: bump to 0.9.0.1
acpid: update from 2.0.22 to 2.0.23
laszip: fix maintainer reference

This unblocks the channel.
gpgme: update from 1.4.3 to 1.5.1
gtkspell3: update from 3.0.4 to 3.0.6
hatari: update from 1.6.2 to 1.8.0
imapfilter: update from 2.5.4 to 2.5.6
libgpgerror: update from 1.12 to 1.13
libpng15: update from 1.5.18 to 1.5.19
libpng: use spdx licensing method
opusTools: update from 0.1.8 to 0.1.9
opusfile: update from 0.4 to 0.6
orc: update from 0.4.21 to 0.4.22