fix(usage-to-readme): fix multiple .USAGE.md changes

scripts/usage-to-readme.js

@@ -10,12 +10,15 @@ const { execFile } = require('node:child_process')
 const generateReadme = readFile(join(__dirname, 'README.md.tpl'), 'utf8').then(compile)
 
 async function usageToReadme(...args) {
+  console.error(process.argv, args)
+
   const gitAdd = args[0] === '--git-add'
   if (gitAdd) {
     args.shift()
   }
 
-  const usagePath = args[0]
+  for (const usagePath of args) {
+    console.error(usagePath)
     const dir = dirname(usagePath)
 
     const [usage, pkg] = await Promise.all([
@@ -33,11 +36,14 @@ async function usageToReadme(...args) {
           .on('exit', code => {
             if (code !== 0) {
               reject(new Error('command exited with non-zero status code: ' + code))
+            } else {
+              resolve()
             }
           })
       })
     }
   }
+}
 
 if (module.parent !== null) {
   module.exports = usageToReadme