fix: local package dep fix

chore: update version

fix: OpenAIEncoder, tests, and docs

fix: tiktoken dep

fix: typo in deprecation warning

chore: splitters deprecation warning

chore: v0.0.41 release

fix: base.py typo

fix: is_valid_inputs in base.py

fix: Cohere to v5

The newer version of cohere can return incorrect types.

Need to specify texts is the first arg for cohere v^5.00.

chore: v0.0.40 release

fix: Use 'api_key' parameter if passed explicitly