Release v0.5.8

What's Changed

• Exclude "com.docker.grpcfuse.ownership" xattr by @jonjohnsonjr in #981
• Fix race condition in log monitoring by @jonjohnsonjr in #982
• eliminate some more logger invocations by @imjasonh in #983
• Add Close() method to container runners by @jonjohnsonjr in #984
• If arch is not specified, test all. by @vaikas in #985
• Don't use goroutines for monitoring logs by @jonjohnsonjr in #986
• Respond to cancelled context while streaming logs by @jonjohnsonjr in #989
• Add --rm flag (and options) to Build by @jonjohnsonjr in #990

Full Changelog: v0.5.7...v0.5.8