CI: Extract test coverage information

.gitlab-ci.yml

@@ -48,4 +48,10 @@ test:
     key: '$CI_COMMIT_SHORT_SHA'
     policy: pull
   script:
-    - yarn test
\ No newline at end of file
+    - yarn test --coverage
+  coverage: '/^All files [^|]* \| *([^|]*) *\| .*$/'
+  artifacts:
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage/clover.xml