fix(package-source): fix check for deprecated package

Closes #114

src/__tests__/package-source.test.ts

@@ -6,6 +6,7 @@ test('package source', async () => {
 
   expect(result).not.toBeNull()
   expect(result.name).toBe('awilix')
+  expect(result.deprecated).toBe(false)
   expect(result.latestVersion).toBeDefined()
 
   // I wrote Awilix, and I know v2 didn't have typings while v3 did,
@@ -28,3 +29,10 @@ test('not found', async () => {
   const result = await source.fetch(`some-nonexistent-package-${Date.now()}`)
   expect(result).toBeNull()
 })
+
+test('deprecated', async () => {
+  const source = createPackageSource()
+  const result = await source.fetch(`@types/escape-goat`)
+  expect(result).not.toBeNull()
+  expect(result!.deprecated).toBe(true)
+})

src/package-source.ts

@@ -28,24 +28,23 @@ export function createPackageSource(): IPackageSource {
         return null
       }
 
-      const versions = Object.keys(data.versions).map<IPackageVersionInfo>(
-        (v) => {
-          const item = data.versions[v]
-          return {
-            version: item.version,
-            containsInternalTypings: !!item.types || !!item.typings,
-          }
-        },
-      )
+      const versionIdentifiers = Object.keys(data.versions)
+        .sort(compare)
+        .reverse()
+      const versions = versionIdentifiers.map<IPackageVersionInfo>((v) => {
+        const item = data.versions[v]
+        return {
+          version: item.version,
+          containsInternalTypings: !!item.types || !!item.typings,
+        }
+      })
 
       return {
         name: data.name,
-        deprecated: Boolean(data.deprecated),
+        deprecated: Boolean(data.versions[versionIdentifiers[0]].deprecated),
         latestVersion: data['dist-tags'].latest,
         // Sort by version, highest version first.
-        versions: versions
-          .sort((left, right) => compare(left.version, right.version))
-          .reverse(),
+        versions: versions,
       }
     },
   }