Previously the PDF viewer on the resources page had a fixed width no matter what size the viewport was. This led to unsightly behaviour on mobile. This fix sets the PDF viewer width to 100% (i.e. auto), so that it scales with the size of the viewport.
This also reverts d3f404453584b10935017c3caab5867a0da06a61, which updated the .travis.yaml file mistakenly.
Description
Previously the PDF viewer on the resources page had a fixed width no matter what size the viewport was. This led to unsightly behaviour on mobile. This fix sets the PDF viewer width to 100% (i.e. auto), so that it scales with the size of the viewport.
This also reverts d3f404453584b10935017c3caab5867a0da06a61, which updated the .travis.yaml file mistakenly.