feat: add plutus version to aiken.toml

relates to #907

crates/aiken-project/src/blueprint/mod.rs

@@ -8,7 +8,7 @@ pub mod validator;
 pub use error::Error;
 
 use crate::{
-    config::{self, Config},
+    config::{self, Config, PlutusVersion},
     module::CheckedModules,
 };
 use aiken_lang::gen_uplc::CodeGenerator;
@@ -44,13 +44,6 @@ pub struct Preamble {
     pub license: Option<String>,
 }
 
-#[derive(Debug, PartialEq, Clone, serde::Serialize, serde::Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub enum PlutusVersion {
-    V1,
-    V2,
-}
-
 #[derive(Debug, PartialEq, Clone, serde::Serialize, serde::Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Compiler {
@@ -151,7 +144,7 @@ impl From<&Config> for Preamble {
                 name: "Aiken".to_string(),
                 version: config::compiler_version(true),
             }),
-            plutus_version: PlutusVersion::V2,
+            plutus_version: config.plutus_version,
             version: config.version.clone(),
             license: config.license.clone(),
         }