chore: Upgrade node version to 18

[davidgamez]

Summary

Resolves #96

This PR upgrades the node version to 18, the latest LTS as of now(April 2023). After upgrading the node version noticed unit tests failing due to issues processing IPv6 localhost at GitHub actions. Fixed the test forcing the use of 127.0.0.1 as the host address while running unit tests.

Expected behavior

• Node version minimum version is set to 14 and recommended to 18 on the README file.
• GitHub actions node version set to 18
• Unit tests pass successfully

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