fix build script ignoring last lines

build.ts

@@ -78,6 +78,8 @@ class Minifier {
       flush: (controller) => {
         this.buffer += "\n";
         controller.enqueue(this.processChunk());
+        controller.enqueue(this.lines.join("\n") + "\n");
+        this.lines = [];
       },
     });
 
@@ -139,7 +141,7 @@ async function build(output: WritableStreamDefaultWriter<string>) {
     const readable = file.readable.pipeThrough(new TextDecoderStream())
       .pipeThrough(new TextLineStream());
 
-    output.write(`
+    await output.write(`
 ;/*******************************
 ;* ${path}
 ;*******************************/
@@ -147,7 +149,7 @@ async function build(output: WritableStreamDefaultWriter<string>) {
 
     for await (const line of readable) {
       if (!line.startsWith("include ")) {
-        output.write(`${line}\n`);
+        await output.write(`${line}\n`);
       }
     }
   }
@@ -166,15 +168,16 @@ async function build(output: WritableStreamDefaultWriter<string>) {
     );
   }
 
-  output.write(asmRawRepresentations.join("\n\n"));
+  await output.write(asmRawRepresentations.join("\n\n"));
 
-  output.write(`
+  await output.write(`
 ;
 ; RESERVED RAM SPACE
 ;
 `);
 
-  output.write(await Deno.readTextFile(reservedSpacePath));
+  await output.write(await Deno.readTextFile(reservedSpacePath));
+  await output.close();
 }
 
 /**