v1.8.0

What's Changed

• Fix .phar URL in README.md by @pyguerder in #93
• Various improvements and renamings by @tgalopin in #94
• Automate releasing and add PHP 8 in CI by @tgalopin in #95
• Fix command return code for CI by @tgalopin in #97
• Add poll-period option by @tgalopin in #98
• Upgrade JMS serializer by @tgalopin in #99
• Lock platform to php 7.2.5 by @nicolas-grekas in #101

Full Changelog: v1.7.1...v1.8.0