Updated examples and fixed npm audit reports

[mmacai]

Description

• fixed some npm audit reports
• updated channels example to use kafkajs
• updated channels example and smoke tests to use node 14

What to look out for

• all cypress tests should pass

Process

The goal is to improve not only the code in this PR but also our skills! The "rules":

• The review is considered "done" as soon as all reviewers have added their review, and all their comments have been addressed.
• For knowledge-sharing reviews, each reviewer should "approve" the PR after studying its content.
• After the approval, the merge is concluded by the developer.

Have fun!

[kevinbader]

LGTM