Update dependency codecov to v3.4.0

Author: renovate-bot

package-lock.json

@@ -45,7 +45,7 @@
     "@types/enzyme-adapter-react-16": "1.0.5",
     "@types/jest": "23.3.14",
     "@types/pdfobject": "2.0.6",
-    "codecov": "3.3.0",
+    "codecov": "3.4.0",
     "custom-tslint-formatters": "2.4.0",
     "enzyme": "3.9.0",
     "enzyme-adapter-react-16": "1.12.1",