Update to version plymouth-0.9.5+git20200709+ab986a9: main: Don't bail out of load_settings if Theme is missing; main: switch log file when switching mode; two-step: Center message text within labels if labels are centered; Add CI pipeline for Plymouth; Apply suggestion to .gitlab-ci.yml; configure: bump to 0.9.6; configure: quiet a warning; po: drop intltool usage; docs: fix man page cross-reference; Rename 'percent_done' to 'fraction_done'