fix(videojs): missing return in registerComponent

[amtins]

Description

This PR fixes the missing return in the videojs.registerComponent function to be in line with the documentation, see

video.js/src/js/video.js

Lines 304 to 320 in 1491d71

	/**
	* Register a component so it can referred to by name. Used when adding to other
	* components, either through addChild `component.addChild('myComponent')` or through
	* default children options `{ children: ['myComponent'] }`.
	*
	* > NOTE: You could also just initialize the component before adding.
	* `component.addChild(new MyComponent());`
	*
	* @param {string} name
	* The class name of the component
	*
	* @param {Component} comp
	* The component class
	*
	* @return {Component}
	* The newly registered component
	*/

Use case

class CustomComponent extends videojs.getComponent('Component'){}

export default videojs.registerComponent(CustomComponent.name, CustomComponent);

Specific Changes proposed

• add the missing return statement
• add test case

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

Merging #8247 (f172a63) into main (1491d71) will increase coverage by 82.36%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##           main    #8247       +/-   ##
=========================================
+ Coverage      0   82.36%   +82.36%     
=========================================
  Files         0      112      +112     
  Lines         0     7474     +7474     
  Branches      0     1800     +1800     
=========================================
+ Hits          0     6156     +6156     
- Misses        0     1318     +1318     

Impacted Files	Coverage Δ
src/js/video.js	94.06% <100.00%> (ø)

... and 111 files with indirect coverage changes

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