Merge pull request #436 from hpcc-systems/dependabot/npm_and_yarn/langchain-0.2.20

chore(deps-dev): bump langchain from 0.2.18 to 0.2.20

Author: GordonSmith

package-lock.json

@@ -105,7 +105,7 @@
     "esbuild-plugin-umd-wrapper": "3.0.0",
     "eslint": "8.57.0",
     "eslint-plugin-react-hooks": "4.6.2",
-    "langchain": "0.2.18",
+    "langchain": "0.2.20",
     "mocha": "10.7.3",
     "npm-run-all": "4.1.5",
     "react": "17.0.2",