[librsvg: 4/4] Merge branch 'more-filters' into 'master'

[Federico Mena Quintero <federico src gnome org>]

commit 41ce499e97d3987172b84f9f61a72debfb3979bf
Merge: fa066c61 60ec5b65
Author: Federico Mena Quintero <federico mena gmail com>
Date:   Thu May 13 16:04:15 2021 +0000

    Merge branch 'more-filters' into 'master'
    
    Implement opacity and saturate filter functions
    
    See merge request GNOME/librsvg!522

 src/filter_func.rs                | 163 ++++++++++++++++++++++++++++++++++--
 src/filters/component_transfer.rs |  36 ++++----
 tests/src/filters.rs              | 171 ++++++++++++++++++++------------------
 3 files changed, 263 insertions(+), 107 deletions(-)
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