Zoom with gestures

[durini309]

As a user I would like to have a way to zoom in/out a PDF file by using pinch gestures.

Currently we can zoom in/out a PDF by double tapping the PDF, but this is really limited: we can either see the whole page or just a small portion of it.

Another suggestion, in case this is too difficult to do, you can expose the scale property so that we can have an state were we update it's value based on user's pinch gestures

[Thorusan]

It will be available, when this PR will be approved: #50

[Fangio92]

When it will be approved?

[priyanaka08]

hi, did pinch to Zoom is available now?

[qasimabdani123]

we need pinch zoom option