* gnu/packages/skribilo.scm (skribilo): Update to 0.9.5.
[arguments]: Adjust 'pre-configure' phase to use the right effective
version.
[inputs]: Replace GUILE-2.2 with GUILE-3.0.
[propagated-inputs]: Adjust accordingly.
* gnu/packages/guile-xyz.scm (guile-reader)[inputs]: Switch to GUILE-3.0.
(guile2.2-reader): New variable.
* gnu/packages/guile-xyz.scm (haunt)[propagated-inputs]: Add GUILE-READER.
(guile2.2-haunt)[propagated-inputs]: Use GUILE2.2-READER.
* gnu/packages/skribilo.scm (skribilo)[propagated-inputs]: Use
GUILE2.2-READER and GUILE2.2-LIB.