Here is the updated spec and srpms build for mendeley 1.19.4

SPEC:
https://github.com/luyatshimbalanga/mendeley-rpm/blob/1.19.4/mendeleydesktop.spec

SRPMS:
https://github.com/luyatshimbalanga/mendeley-rpm/releases/download/1.19.4/mendeleydesktop-1.19.4-1.fc30.x86_64.rpm

Description
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Mendeley is a combination of a desktop application and a website which
helps you manage, share and discover both content and contacts in research.

Why this package is not eligible to be included in Fedora. 
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Mendeley does not provide the source tarball needed to create binary
applications. It also bundles libraries and one of its license is proprietary.


New ticket created upon request from
https://bugzilla.rpmfusion.org/show_bug.cgi?id=4041#c50 although the package
was recently approved.

Original review starting on
https://bugzilla.rpmfusion.org/show_bug.cgi?id=4041#c28