build(deps): update langchain-core requirement from >=1.5.4 to >=1.6.0

[dependabot]

Updates the requirements on langchain-core to permit the latest version.

Release notes

Sourced from langchain-core's releases.

langchain-core==1.6.0

Changes since langchain-core==1.5.6

release(core): 1.6.0 (#39760) fix(core): resolve postponed annotations in StructuredTool._injected_args_keys (#39602) feat(core): add standard model exception types (#39538) fix(core): allow deserializing RunnablePick (#39753) fix(core): make convert_to_openai_function handle callables and non-dict mappings (#39750) fix(core): make subprocess and temporary file tests portable on Windows (#39664) fix(core): fail fast when tool schemas can't resolve forward refs during serialization (#39570) test(core): avoid version-dependent runnable snapshots (#39705) fix(core): require all nested properties for strict tool schemas (#39306) fix(core): remove stale sync-stream xfail [closes #39720] (#39723) perf(core): Lazily import transformers (#38037) fix(core): accept non-dict Mapping values in mustache templates (#39680) docs(core): clarify Runnable pipe coercion [closes #39075] (#39707) fix(core): finalize chain-group runs on BaseException (#39699)

Commits

• 85602c3 release(core): 1.6.0 (#39760)
• 5c3538e fix(core): resolve postponed annotations in `StructuredTool._injected_args_ke...
• 9984a87 feat(core): add standard model exception types (#39538)
• b3e9eef chore(model-profiles): refresh model profile data (#39751)
• ded2a1f fix(core): allow deserializing RunnablePick (#39753)
• 04ae744 fix(core): make convert_to_openai_function handle callables and non-dict ma...
• 37f2662 feat(langchain): support custom token_counter in ContextEditingMiddleware (#3...
• 2019bf5 fix(openai): raise clear error on unexpected response type in `_create_chat_r...
• e92c6db fix(langchain): re-raise non-retryable exceptions in ModelRetryMiddleware (#3...
• f368888 fix(partners): isolate unit tests from network [closes #39727] (#39729)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)