Update dependency graphql-sse to v2.6.0 (#86)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

projects/lib/package.json

@@ -19,7 +19,7 @@
     "apollo-angular": "^10.0.0 || ^11.0.0",
     "gql-query-builder": "^3.8.0",
     "graphql": "^17.0.0 || ^16.10.0",
-    "graphql-sse": "2.5.4",
+    "graphql-sse": "2.6.0",
     "rxjs": "~7.8.0",
     "zone.js": "~0.15.1",
     "jsonpath": "^1.1.1"