ci: add cobertura coverage report

.gitlab-ci.yml

@@ -52,6 +52,12 @@ unit:
   stage: test
   script:
     - npm test
+  coverage: '/Statements[^:]*\:[^:]*\s+([\d\.]+)%/'
+  artifacts:
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage/cobertura-coverage.xml
 
 pages:
   stage: deploy

package.json

@@ -11,7 +11,7 @@
     "prepublishOnly": "npm ci && npm run build",
     "preversion": "npm run prepublishOnly",
     "push": "git push && git push origin \"v$npm_package_version\"",
-    "test": "nyc mocha --require ts-node/register --recursive 'test/*.spec.ts'",
+    "test": "nyc mocha --recursive 'test/*.spec.ts'",
     "lint": "eslint --ext .ts src/"
   },
   "description": "Node.js library to interact with the StApps backend service",
@@ -113,6 +113,7 @@
     "lines": 95,
     "per-file": true,
     "reporter": [
+      "cobertura",
       "html",
       "text-summary"
     ],