Adding builder for structs generated by dto mapper (#7)

* reformating code with rust fmt

* Adding builder for structs generated by dto mapper

Author: douggynix

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "dto_mapper"
-version = "0.1.2"
+version = "0.1.3"
 edition = "2021"
 authors = ["James Douglass Lefruit"]
 description = "A library to create dynamic DTOs (Data Transfer Object) from a structure"
@@ -24,3 +24,6 @@ proc-macro2 = "1.0.69"
 quote = "1.0.33"
 syn = { version = "2.0.39", features = ["full"] }
 
+[dev-dependencies]
+derive_builder = "0.12.0"
+