Push code coverage percentages to codecov.io.

.github/workflows/test.yaml

@@ -16,3 +16,6 @@ jobs:
         run: "yarn install"
       - name: Jest
         run: "yarn run test"
+      - name: Upload to codecov
+        uses: codecov/codecov-action@v3
+        flags: unittests

package.json

@@ -122,6 +122,11 @@
       "\\.(css|less|svg)+$": "identity-obj-proxy",
       "^\\./IndexedDBWorker\\?worker$": "<rootDir>/test/mocks/workerMock.ts",
       "^\\./olm$": "<rootDir>/test/mocks/olmMock.ts"
-    }
+    },
+    "collectCoverage": true,
+    "coverageReporters": [
+      "text",
+      "cobertura"
+    ]
   }
 }