chore(xcsp3-serde): release v0.1.6

Author: Dekker1

crates/xcsp3-serde/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "xcsp3-serde"
-version = "0.1.5"
+version = "0.1.6"
 description = "XCSP3 serialization and deserialization"
 authors = ["Jip J. Dekker <jip@dekker.one>"]