Log Message:
dupeguru: update to 4.0.4rc1.

Fixes build.

Changes Since Last Release

    Update qt/platform.py to support other Unix style OSes (#444)
    Fix font size scaling issue in properties dialog [qt] (#504)
    Updates to support Python 3.7
    Fix issue with result window appearing partially off-screen [qt] (#521)
    Fix translation error for Simplified Chinese
    Updates to language files for German (#479)
    Fix error with multiple close calls to the progress window [qt] (#460, #449)
    Add Travis CI Builds
    Un-recurse methods get_files() and get_state() to improve stability (#421)
    Updates to language files for Italian (#445, #446, #447, #448)
    Fix issue with cache_shelve (#402, #439)
    Updated Windows packaging and builds (#438, #456, #461, #491, #474, #490, #565)
    Handle OS termination signals (#425)
    Make documentation installation optional
    Move cocoa UI to dupeguru-cocoa [cocoa]