Minify worker source

tasks/serialize-workers.js

@@ -29,8 +29,14 @@ async function build(input, {minify = true} = {}) {
           }
         ]
       ]
-    }),
+    })
-    {
+  ];
+
+  if (minify) {
+    plugins.push(terser());
+  }
+
+  plugins.push({
     name: 'serialize worker and export create function',
     renderChunk(code) {
       return `
@@ -42,12 +48,7 @@ async function build(input, {minify = true} = {}) {
         }
       `;
     }
-    }
+  });
-  ];
-
-  if (minify) {
-    plugins.push(terser());
-  }
 
   const bundle = await rollup.rollup({input, plugins});
   const {output} = await bundle.generate({format: 'es'});