Dream 1.0.0~alpha8

Additions and improvements

• Replace vendored http/af stack with depending on httpun from opam (#351).
• Log fd numbers for each request (#345).

Examples

• mlx (#330, Andrey Popp @andreypopp).
• dream-html (#323, Yawar Amin @yawaramin).
• Satisfy opam lint in all examples (#356, @alxtuz).
• Fix anchor in links to examples (#361, @alxtuz).

Miscellaneous

• Remove unused docstrings (#342, Max Große @maxRN).
• Fix and update the CI (#337, with Max Große @maxRN).
• Fix link into e-json example (#354, Emmanuel Ferdman @emmanuel-ferdman).