Update project dependencies

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Issue

There are a couple of vulnerability reports from github and also when you execute npm install (yarn does not seem to report vulnerabilities though)

Solution

• Update package dependencies to the recommended versions.
• Test if any of those updated dependencies would break xjs build and docs.

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npm audit report result:

found 79 vulnerabilities (30 low, 23 moderate, 25 high, 1 critical) in 5666 scanned packages

I'll push a initial commit to a separate branch with the updated packages using npm audit fix

EDIT

After executing npm audit fix, our project still has a couple of vulnerable packages:

found 23 vulnerabilities (14 low, 8 high, 1 critical) in 8892 scanned packages
  23 vulnerabilities require semver-major dependency updates.