Release python lambda sdk v0.1.18

[selcukcihan]

Release fixes for

• https://linear.app/serverless/issue/SC-977/user-thetie-seeing-error-in-production-mode-with-python-sdk
• https://linear.app/serverless/issue/SC-1062/python-sdk-function-within-vpc-and-dev-mode-enabled-timesout-function

[selcukcihan]

@medikoo ready for review please