make geopub/leaflet a separate library

dune-project

@@ -0,0 +1,33 @@
+(lang dune 2.9)
+
+(implicit_transitive_deps false)
+
+(name leaflet)
+
+(license ISC)
+
+(authors "TODO")
+
+(maintainers "TODO")
+
+(source
+ (uri TODO/leaflet))
+
+(homepage TODO/leaflet)
+
+(bug_reports TODO/leaflet)
+
+(documentation TODO/leaflet)
+
+(generate_opam_files true)
+
+(package
+ (name leaflet)
+ (synopsis "OCaml library/executable to TODO")
+ (description
+  "leaflet is an OCaml library/executable to TODO.")
+ (tags
+  (leaflet TODO TODO TODO TODO))
+ (depends
+  (ocaml
+   (>= 4.08))))