build(deps): update lodash requirement from ^4.17.15 to ^4.17.21 in /superset-frontend/plugins/plugin-chart-echarts (#26541)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

superset-frontend/plugins/plugin-chart-echarts/package.json

@@ -29,7 +29,7 @@
   "dependencies": {
     "d3-array": "^1.2.0",
     "echarts": "^5.4.1",
-    "lodash": "^4.17.15",
+    "lodash": "^4.17.21",
     "moment": "^2.26.0"
   },
   "peerDependencies": {