Bump to LangChain 1.1, update dependencies, and bump version

[NormallyGaussian]

LangChain 1.x was released in October, but langchain-parallel is incompatible. Bumping dependencies to match what is in the open source package. https://blog.langchain.com/langchain-langgraph-1dot0/

[anshultomar746]

Could you run the tests once to see if everything works

Unit Tests Only (Recommended for Development)

# Run unit tests with network disabled
poetry run pytest --disable-socket --allow-unix-socket --asyncio-mode=auto tests/unit_tests/ -v

Integration Tests (Requires API Key)

# Set your API key first
export PARALLEL_API_KEY="your-actual-api-key-here"

# Run integration tests
poetry run pytest --asyncio-mode=auto tests/integration_tests/ -v

[NormallyGaussian]

@anshultomar746 I ran unit and integration tests successfully. I bumped the timeout for the extract API in integration tests as it was flakey. Fixed the GitHub action, too, so the unit tests should run on PRs.