revelation 0.5.5

Bugfixes:

• Fix building with >=Meson-0.60 #87 [Jay Faulkner]
• Fix importing GPass-0.5.1 files #72 [Miquel Garriga]
• Fix Metainfo errors reported by Debian

Translation:

• Update French #74

Others:

• Code changes based on flake8 and bandit
• First Meson only supported release [Germán Poo-Caamaño]