Raise version number to 3.13.90

Schedule says that version is already up. We missed a release it seems.
Prepare for release 3.13.90
Post-release version bump
tests: remove zh_CN locale from screenshot tour

Continuous doesn't have required fonts installed, so test fails
Updated Bulgarian translation.
Fix tags in Finnish help translation
Updated Korean translation
Prepare for release 3.13.92
Post-release version bump
Finnish translation update
Prepare for release 3.14.0
Post-release version bump
Updated Nepali translation
Updated Nepali translation
Updated Nepali translation
Fix build without XMP support

https://bugzilla.gnome.org/show_bug.cgi?id=737213
Updated Brazilian Portuguese translation