0.5.4

769a9e2 properly implement non-closing IO in taskexec
8422cf9 gitlab-runner: collect any exit code status via file, allow passing custom cpu,cores,memory settings
76f3f23 taskexec: default sys.stdout.buffer when stdout is None
a0d43bf gitlabrunner: fix job purging error
a45b6e5 watch: fix thread already started error