graphics/gource: undeprecate, update to 0.55 release, fix build with Boost-1.89 (+)
Release notes: https://github.com/acaudwell/Gource/releases/tag/gource-0.52 \
https://github.com/acaudwell/Gource/releases/tag/gource-0.53 \ https://github.com/acaudwell/Gource/releases/tag/gource-0.54 \ https://github.com/acaudwell/Gource/releases/tag/gource-0.55
Reported by: fallout
Approved by: maintainer ignorance of passed deprecation date