fix(dmg): adding 10% on size for temporary dmg used in hdiutil (#4171)

Close #3301

Author: vladotesanovic

packages/dmg-builder/src/dmg.ts

@@ -38,7 +38,8 @@ export class DmgTarget extends Target {
     // https://github.com/electron-userland/electron-builder/issues/2115
     const backgroundFile = specification.background == null ? null : await transformBackgroundFileIfNeed(specification.background, packager.info.tempDirManager)
     const finalSize = await computeAssetSize(packager.info.cancellationToken, tempDmg, specification, backgroundFile)
-    await exec("hdiutil", ["resize", "-size", finalSize.toString(), tempDmg])
+    const expandingFinalSize = (finalSize * 0.1) + finalSize
+    await exec("hdiutil", ["resize", "-size", expandingFinalSize.toString(), tempDmg])
 
     const volumePath = path.join("/Volumes", volumeName)
     if (await exists(volumePath)) {