Fix missing buffer type error

Users may need to include dom in their tsconfig.json if
they run into errors with Blob not found

Author: stnguyen90

templates/node/index.d.ts.twig

@@ -131,7 +131,7 @@ declare module "{{ language.params.npmPackage|caseDash }}" {
 
     static fromBuffer(buffer: Buffer, filename: string): InputFile;
 
-    static fromBlob(blob: buffer.Blob, filename: string): Promise<InputFile>;
+    static fromBlob(blob: Blob, filename: string): Promise<InputFile>;
 
     static fromStream(stream: NodeJS.ReadableStream, filename: string, size: number): InputFile;