v0.8.0

What's Changed

• Expose PingResult by @aisk in #50
• Derive Debug and Clone for Ping by @aisk in #51
• Fix ICMP reply decoding robustness by @aisk in #53
• Decode replies using actual received length by @aisk in #54
• Add rustdoc to public API by @aisk in #55

Full Changelog: v0.7.1...v0.8.0