fix: prev

Author: sxzz

scripts/compare-size.js

@@ -28,7 +28,7 @@ async function renderFiles() {
   const filterFiles = files => files.filter(file => !file.startsWith('_'))
 
   const curr = filterFiles(await readdir(currDir))
-  const prev = filterFiles(await readdir(prevDir))
+  const prev = existsSync(prevDir) ? filterFiles(await readdir(prevDir)) : []
   const fileList = new Set([...curr, ...prev])
 
   /** @type string[][] */