tiny_httpd.core is required since 0.17

[davesnx]

Error: This expression has type [> `GET ]
       but an expression was expected of type Tiny_httpd_core.Meth.t
       Tiny_httpd_core.Meth.t is abstract because no corresponding cmi file was found in path.

Probably implicit transitive dependencies from dune, fixes this.

[c-cube]

could you try with current main branch? I added some re_export