more refactoring for getDeniedChanges

src/deny.ts

@@ -3,21 +3,22 @@ import * as core from '@actions/core'
 
 export async function getDeniedChanges(
   changes: Change[],
-  deniedPackages: string[],
-  deniedGroups: string[]
+  deniedPackages: string[] = [],
+  deniedGroups: string[] = []
 ): Promise<Change[]> {
   const changesDenied: Change[] = []
 
   let hasDeniedPackage = false
   for (const change of changes) {
-    change.name = change.name.toLowerCase()
-    const [name, version] = change.package_url.toLowerCase().split('@')
+    const [packageName, packageVersion] = change.package_url
+      .toLowerCase()
+      .split('@')
 
     for (const denied of deniedPackages) {
       const [deniedName, deniedVersion] = denied.toLowerCase().split('@')
       if (
-        (!deniedVersion || version === deniedVersion) &&
-        name === deniedName
+        (!deniedVersion || packageVersion === deniedVersion) &&
+        packageName === deniedName
       ) {
         changesDenied.push(change)
         hasDeniedPackage = true
@@ -25,7 +26,7 @@ export async function getDeniedChanges(
     }
 
     for (const denied of deniedGroups) {
-      if (name.startsWith(denied.toLowerCase())) {
+      if (packageName.startsWith(denied.toLowerCase())) {
         changesDenied.push(change)
         hasDeniedPackage = true
       }