Messaging API Common Helpers

messaging-api-common provides shared utilities (case conversion and Axios request interceptors) for the messaging-apis family of chatbot SDKs (Messenger, LINE, Slack, Viber, Telegram). Currently at v1.0.4 (Jan 2021) with no further releases; the project has moved to v1.1.x of other packages but this common package remains unchanged. Keys differ from alternatives by offering both shallow and deep snakecase/camelcase/pascalcase conversions plus a factory for Axios interceptors. TypeScript types are included.