dyff release v1.5.4

Changelog

• 4b398d4 Fix broken test case
• 07f2144 Fix markdown parsing in multiline diff
• d3e157c Fix assumptions about text being markdown by default for multiline output
• 64fdf3c Bump gopkg.in/yaml.v3 to v3.0.1

What's Changed

• Fix markdown parsing of multiline text by @dlmather in #226 and by @HeavyWombat in #227

Full Changelog: v1.5.3...v1.5.4