Request matching version of plasma-workspace libs
Summary:
We never remember to manually update it given the tight plasma coupling.
We use ${PROJECT_VERSION} when finding Breeze so the concept clearly
works and it shouldn't have any more negative impact.
Test Plan: Compiles
Reviewers: Plasma, apol
Reviewed By: apol
Subscribers: bcooksley, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D23569