feat(storage): update the API

#### storage:v1
The following keys were added:
- schemas.Bucket.properties.iamConfiguration.properties.publicAccessPrevention.description
- schemas.Bucket.properties.iamConfiguration.properties.publicAccessPrevention.type

discovery/storage-v1.json

@@ -26,7 +26,7 @@
   "description": "Stores and retrieves potentially large, immutable data objects.",
   "discoveryVersion": "v1",
   "documentationLink": "https://developers.google.com/storage/docs/json_api/",
-  "etag": "\"343633363836393231343833333835333032\"",
+  "etag": "\"32313837343738383335383432353737343034\"",
   "icons": {
     "x16": "https://www.google.com/images/icons/product/cloud_storage-16.png",
     "x32": "https://www.google.com/images/icons/product/cloud_storage-32.png"
@@ -3230,7 +3230,7 @@
       }
     }
   },
-  "revision": "20201106",
+  "revision": "20201112",
   "rootUrl": "https://storage.googleapis.com/",
   "schemas": {
     "Bucket": {
@@ -3337,6 +3337,10 @@
               },
               "type": "object"
             },
+            "publicAccessPrevention": {
+              "description": "The bucket's Public Access Prevention configuration. Currently, 'unspecified' and 'enforced' are supported.",
+              "type": "string"
+            },
             "uniformBucketLevelAccess": {
               "description": "The bucket's uniform bucket-level access configuration.",
               "properties": {

src/apis/storage/v1.ts

@@ -169,6 +169,7 @@ export namespace storage_v1 {
      */
     iamConfiguration?: {
       bucketPolicyOnly?: {enabled?: boolean; lockedTime?: string};
+      publicAccessPrevention?: string;
       uniformBucketLevelAccess?: {enabled?: boolean; lockedTime?: string};
     } | null;
     /**