Add version to dune-project

yallop · yallop · commit 611185427ead · 2023-07-20T20:40:52.000+01:00
See #588 (comment)
diff --git a/dune-project b/dune-project
@@ -1,5 +1,6 @@
 (lang dune 2.9)
 (name ctypes)
+(version 0.21.1)
 (formatting (enabled_for dune))
 (use_standard_c_and_cxx_flags true)
 
