build(deps): bump d3-sankey-diagram

Bumps [d3-sankey-diagram](https://github.com/ricklupton/d3-sankey-diagram) from 0.7.3 to 0.8.0.
- [Release notes](https://github.com/ricklupton/d3-sankey-diagram/releases)
- [Commits](https://github.com/ricklupton/d3-sankey-diagram/commits)

---
updated-dependencies:
- dependency-name: d3-sankey-diagram
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

superset-frontend/plugins/legacy-plugin-chart-sankey-loop/package.json

@@ -23,7 +23,7 @@
     "lib"
   ],
   "dependencies": {
-    "d3-sankey-diagram": "^0.7.3",
+    "d3-sankey-diagram": "^0.8.0",
     "d3-selection": "^1.4.0",
     "prop-types": "^15.8.1"
   },