Catch a JS Error + code cleanup

[Lendemor]

Description

Changes:

• Small refactoring in the hydrate middleware
• Add some security check to Icon component (to prevent some JS error being thrown)
  • Throw error if children passed to pc.icon()
  • Throw error if tag component is not passed.

Checklist

All Submissions:

• Have you followed the guidelines stated in CONTRIBUTING.md file?
• Have you checked to ensure there aren't any other open Pull Requests for the desired changed?

Type of change

• Bug fix (non-breaking change which fixes an issue)

New Feature Submission:

• Does your submission pass the tests?
• Have you linted your code locally prior to submission?

Changes To Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?

[Alek99]

Looks good to me. Thanks!

[picklelo]

One small change

[picklelo]

Sweet