Replace loop with `TypedArray.prototype.set` in the `DecryptStream.readBlock` method
Replace loop with `TypedArray.prototype.set` in the `DecryptStream.readBlock` method

There's no reason to use a manual loop, when a native method exists.

timvandermeij/pdf.js,mozilla/pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js,mozilla/pdf.js,timvandermeij/pdf.js,Snuffleupagus/pdf.js,mozilla/pdf.js,timvandermeij/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js,Snuffleupagus/pdf.js