refactor: rename type_ to ty in ESModulesPackage

I noticed that this specific evasion of the "type" keyword is already used in
utils::manifest::NpmPackage in the tests, so just match that.

src/manifest/mod.rs

@@ -699,7 +699,7 @@ impl CrateData {
 
         NpmPackage::ESModulesPackage(ESModulesPackage {
             name: data.name,
-            type_: "module".into(),
+            ty: "module".into(),
             collaborators: pkg.authors.clone(),
             description: self.manifest.package.description.clone(),
             version: pkg.version.to_string(),
@@ -730,7 +730,7 @@ impl CrateData {
 
         NpmPackage::ESModulesPackage(ESModulesPackage {
             name: data.name,
-            type_: "module".into(),
+            ty: "module".into(),
             collaborators: pkg.authors.clone(),
             description: self.manifest.package.description.clone(),
             version: pkg.version.to_string(),

src/manifest/npm/esmodules.rs

@@ -4,7 +4,7 @@ use manifest::npm::repository::Repository;
 pub struct ESModulesPackage {
     pub name: String,
     #[serde(rename = "type")]
-    pub type_: String,
+    pub ty: String,
     #[serde(skip_serializing_if = "Vec::is_empty")]
     pub collaborators: Vec<String>,
     #[serde(skip_serializing_if = "Option::is_none")]