v1.5.19

What's Changed

• Sync changelog with latest releases by @thePanz in #337
• Remove unsupported/legacy code by @thePanz in #336
• Update php cs fixer by @thePanz in #338
• Hotfix: Add type checking for deserialized data by @darkpills @thePanz @thirsch

Full Changelog: v1.5.18...v1.5.19