bug #67 fix(mongodb-store): add back conflict (#373) (OskarStark)

This PR was merged into the main branch.

Discussion
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fix(mongodb-store): add back conflict (#373)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Docs?         | no
| Issues        |
| License       | MIT

Cherry picking php-llm/llm-chain#373

Commits
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5a14503 fix(mongodb-store): add back conflict (#373)

Author: chr-hertel

src/store/composer.json

@@ -49,6 +49,9 @@
     "config": {
         "sort-packages": true
     },
+    "conflict": {
+        "mongodb/mongodb": "<1.21"
+    },
     "extra": {
         "thanks": {
             "name": "symfony/ai",