Update dependency eslint-config-bliss to v6

Author: renovate[bot]

package.json

@@ -36,7 +36,7 @@
     "@babel/plugin-proposal-class-properties": "7.12.1",
     "babel-eslint": "^10.1.0",
     "eslint": "7.15.0",
-    "eslint-config-bliss": "5.0.0",
+    "eslint-config-bliss": "6.0.4",
     "is-ci": "^3.0.1",
     "jasmine-node": "^3.0.0",
     "q": "^1.5.1"