Avoid infinite rebuilds

lib/image-worker-plugin.js

@@ -19,6 +19,8 @@ import glob from 'glob';
 const globP = promisify(glob);
 
 export default function () {
+  let previousWorkerContent;
+
   return {
     name: 'image-worker-plugin',
     async buildStart() {
@@ -56,6 +58,10 @@ export default function () {
         .flat(Infinity)
         .join('\n');
 
+      // If nothing's changed, avoid touching the file to avoid infinite rebuilding in watch mode
+      if (previousWorkerContent === workerFile) return;
+      previousWorkerContent = workerFile;
+
       const tsConfig = {
         extends: '../../../generic-tsconfig.json',
         compilerOptions: {