title: can't import the named export 'computed' from non ecmascript module pinia and Vue 2
body: <p>After installing Pinia on my Vue 2 project, and imported it in the main.js file
  I got this error</p>
  <pre><code>Failed to compile.
  
  ./node_modules/pinia/dist/pinia.mjs 1147:44-52
  Can't import the named export 'computed' from non EcmaScript module (only default export is available)
  </code></pre>