update mat2 to 0.12.4

.gitlab-ci.yml

@@ -43,7 +43,9 @@ tests:debian:
     - python3-coverage xml
   artifacts:
     reports:
-      cobertura: coverage.xml
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage.xml
 
 build-docker:
   stage: build_container

requirements.txt

 mutagen==1.45.1
 ffmpeg==1.4
 bubblewrap==1.2.0
-mat2==0.12.3
+mat2==0.12.4
 flask==2.1.2
 Flask-RESTful==0.3.9
 Flask-Cors==3.0.10