message: fix revisions session operations iface
diff: @@ -100,7 +100,7 @@ export interface IRevisionsSessionOperations {
  * Returns a document revision by change vectors.
  */
  get<TEntity extends object>(changeVectors: string[],
  - callback: ErrorFirstCallback<Map<string, TEntity>>)
  + callback: ErrorFirstCallback<RevisionsCollectionObject<TEntity>>)
  : Promise<RevisionsCollectionObject<TEntity>>;
  /**
  @@ -115,7 +115,7 @@ export interface IRevisionsSessionOperations {
  */
  get<TEntity extends object>(changeVectors: string[],
  documentType: DocumentType<TEntity>,
  - callback: ErrorFirstCallback<Map<string, TEntity>>)
  + callback: ErrorFirstCallback<RevisionsCollectionObject<TEntity>>)
  : Promise<RevisionsCollectionObject<TEntity>>;
  }
  