Update dependencies - 2nd try (security)

[arm4b]

Second stage to update upstream dependencies #133

A follow-up to #183 which updates dependencies minimally via npm audit fix, this PR updates things in a more radical way via npm update.

Before:

found 180 vulnerabilities (12 low, 92 moderate, 52 high, 24 critical) in 668 scanned packages

After:

added 136 packages from 120 contributors, removed 143 packages, updated 218 packages, moved 9 packages and audited 700 packages in 885.083s

found 87 vulnerabilities (69 moderate, 16 high, 2 critical)

This may potentially break things, so creating a dedicated PR in case if we'll need to revert it in the future (after e2e st2chatops tests).

[arm4b]

The last working state after reverting failing hubot-spark/@webex updates:

-found 87 vulnerabilities (69 moderate, 16 high, 2 critical)
+found 131 vulnerabilities (12 low, 77 moderate, 32 high, 10 critical)

which is still better than:

found 180 vulnerabilities (12 low, 92 moderate, 52 high, 24 critical)

[nzlosh]

Let's merge and see what happens.

[arm4b]

ChatOps e2e tests for #133 were ✅ .
This PR is ready to be merged too!

[arm4b]

e2e tests are doing good, - glad it worked.

Worth mentioning that our e2e run tests against slack. There is more risk for other supported chat systems. We should ask community to check if things still work in other chat systems during the community pre-release testing.