feat: save 'deprecated' messages in shrinkwrap.yaml

src/install/installMultiple.ts

@@ -308,12 +308,12 @@ async function install (
       throw err
     }
   }
-  if (pkg['deprecated']) {
+  if (pkg.deprecated) {
     deprecationLogger.warn({
       pkgName: pkg.name,
       pkgVersion: pkg.version,
       pkgId: fetchedPkg.id,
-      deprecated: pkg['deprecated'],
+      deprecated: pkg.deprecated,
       depth: options.currentDepth,
     })
   }

src/link/updateShrinkwrap.ts

@@ -116,6 +116,9 @@ function toShrDependency (
   if (pkg.bundledDependencies || pkg.bundleDependencies) {
     result['bundledDependencies'] = pkg.bundledDependencies || pkg.bundleDependencies
   }
+  if (pkg.deprecated) {
+    result['deprecated'] = pkg.deprecated
+  }
   return result
 }
 

src/types.ts

@@ -166,4 +166,8 @@ export type Package = {
   },
   cpu?: string[],
   os?: string[],
+  // TODO: create a separate type called PackageManifest that will have `deprecated`
+  // and won't have `scripts`, `config` and other fields that are not returned by
+  // the registry
+  deprecated?: string,
 }