v2.36 OCaml 5.0 compatibility

Ready for version 2.36

v2.35

[doc] Small correction in Makefile.

hevea 2.34

v2.34

Version 2.34

hevea-2.33

Some mundane modifcations to cope with soon released ocaml 4.10.0

As a result compatibility is claimed from 4.02.3 to ....

hevea-2.32

Additional features

• SVG arrows for hacha by default.