Hugo 0.75.1: A couple of Bug Fixes

This is a bug-fix release with a couple of important fixes.

• resources/image: Fix nilpointer for images with no Exif cd00f7f9 @bep #7688
• modules/npm: Preserve the original package.json if it exists 214afe4c @bep #7690
• tpl: Fix grammar in the new ‘requires non-zero’ error message cd830bb0 @nekr0z