build(deps): update langchain requirement from >=1.4.2 to >=1.4.3

[dependabot]

Updates the requirements on langchain to permit the latest version.

Release notes

Sourced from langchain's releases.

langchain-fireworks==1.4.3

Changes since langchain-fireworks==1.4.2

release(fireworks): 1.4.3 chore: bump vcrpy from 8.1.1 to 8.2.1 in /libs/partners/fireworks (#38314) chore: bump langsmith from 0.8.16 to 0.8.18 in /libs/partners/fireworks (#38313) chore: bump langsmith from 0.8.14 to 0.8.16 in /libs/partners/fireworks (#38235) chore: bump pytest from 9.0.3 to 9.1.0 in /libs/partners/fireworks (#38233) chore(model-profiles): refresh model profile data (#38210) chore(model-profiles): refresh model profile data (#38191) chore(model-profiles): refresh model profile data (#38133) docs: refresh README installation and resources (#38119) release(core): 1.4.7 (#38111) fix(core,partners): rename package version trace metadata (#38110) style(core,langchain,langchain-classic,partners): replace double backticks in docstrings (#38095) chore: bump langsmith from 0.8.9 to 0.8.14 in /libs/partners/fireworks (#38093) release(core): 1.4.6 (#38061) feat(core,partners): add package version tracking to tracing metadata (#35295) chore(infra): bump mypy to 2.1 and unify type-check config across the monorepo (#36470) feat(standard-tests): validate tool call chunks during streaming (#34707) chore(partners): bump locks (#38052) hotfix(openai): min core dep (#37990) chore(model-profiles): refresh model profile data (#37973) chore(model-profiles): refresh model profile data (#37936) test(langchain,partners): disable pytest-benchmark under xdist to silence PytestBenchmarkWarning (#37901) fix(partners): cap aiohttp below 3.14 for vcrpy compat (#37898) chore(model-profiles): refresh model profile data (#37895) chore: bump aiohttp from 3.13.5 to 3.14.0 in /libs/partners/fireworks (#37882) chore: bump langsmith from 0.8.7 to 0.8.9 in /libs/partners/fireworks (#37883) chore: bump langsmith from 0.8.0 to 0.8.7 in /libs/partners/fireworks (#37781) chore: bump requests from 2.34.0 to 2.34.2 in /libs/partners/fireworks (#37782)

Commits

• be854a1 release(langchain): 1.4.3 (#40888)
• 2ade674 fix(langchain): sanitize cache settings for fallback models (#40886)
• 88b9727 feat(fireworks): add prompt caching middleware (#38823)
• 60e57f5 fix(fireworks): classify mid-stream read timeouts (#40874)
• 42f04f4 docs: update OpenWiki (#40781)
• 213f230 chore(model-profiles): refresh model profile data (#40869)
• d750819 chore(model-profiles): refresh model profile data (#40833)
• 1ef23d6 fix(anthropic): serialize invalid tool calls as tool use on replay (#40864)
• 80b7409 feat(langchain): support Bedrock Mantle chat models in init_chat_model (#40...
• 40fe8d6 docs(core): fix docstring examples that don't run as copied (#40815)
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