Add VersionSpec to YamlSerialization

Author: cotti

src/Elastic.Markdown/Myst/YamlSerialization.cs

@@ -21,6 +21,7 @@ public static T Deserialize<T>(string yaml, ProductsConfiguration products)
 			.IgnoreUnmatchedProperties()
 			.WithEnumNamingConvention(HyphenatedNamingConvention.Instance)
 			.WithTypeConverter(new SemVersionConverter())
+			.WithTypeConverter(new VersionSpecConverter())
 			.WithTypeConverter(new ProductConverter(products))
 			.WithTypeConverter(new ApplicableToYamlConverter(products.Products.Keys))
 			.Build();