title: Parcel bundler "ENOENT: no such file or directory" when delete files from project
body: <p>After I've deleted couple files from project that uses Parcel bundler, command <code>parcel ./index.html</code> started to output following error:</p>
  
  <pre><code>Cannot read property 'type' of undefined
  at Bundler.createBundleTree (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:654:54)
  at Bundler.createBundleTree (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:721:12)
  at Bundler.createBundleTree (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:721:12)
  at Bundler.createBundleTree (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:721:12)
  at Bundler.createBundleTree (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:721:12)
  at Bundler.createBundleTree (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:721:12)
  at Bundler.bundle (&lt;project_root&gt;/node_modules/parcel-bundler/src/Bundler.js:298:14)
  at &lt;anonymous&gt;
  at process._tickCallback (internal/process/next_tick.js:189:7)
  </code></pre>