Minor bug fixes
This update includes a number of fixes from the community including exporting the
escape function without needing a connection (@wviveiro), standardizing quotations in a maintenance query to ensure compatibility (@mxmzb), and adding a retry on
PROTOCOL_CONNECTION_LOST errors (@itrendsky) which should resolve the zombie cleanup race condition.
Full Release Notes: https://github.com/jeremydaly/serverless-mysql/releases/tag/v1.5.3