Add support for list overrides

[joachimvh]

Closes #129

Implements what is described in #129 (comment)

Will look into documentation when this is accepted.

Some of the behaviour that happened in the canHandle of the ConfigPreprocessorOverride was moved to the transform call, but this should not have an impact.

[coveralls]

Pull Request Test Coverage Report for Build 7061626539

• 162 of 162 (100.0%) changed or added relevant lines in 9 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 7050284425:	0.0%
Covered Lines:	1493
Relevant Lines:	1493

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💛 - Coveralls

[rubensworks]

This is a really nice PR, I like it!
Just one minor comment, everything else looks perfect IMO.

Before we merge, could you do a quick check to see if it doesn't break anything in Comunica? (I suspect it won't, since Comunica doesn't use overrides anywhere in any case)

[rubensworks]

Instead of adding the handlers here, could we pass them through the options from ComponentsManagerBuilder?

[joachimvh]

No strong opinion either way, just that this was based on how this is done in some other classes:

Components.js/lib/preprocess/ConfigPreprocessorComponentMapped.ts

Lines 39 to 45 in d33d4c2

	private readonly mappingHandlers: IConstructorArgumentsElementMappingHandler[] = [
	new ConstructorArgumentsElementMappingHandlerKeyValue(),
	new ConstructorArgumentsElementMappingHandlerCollectEntries(this.parameterHandler),
	new ConstructorArgumentsElementMappingHandlerFields(),
	new ConstructorArgumentsElementMappingHandlerElements(),
	new ConstructorArgumentsElementMappingHandlerList(),
	];

and

Components.js/lib/preprocess/ParameterHandler.ts

Lines 21 to 27 in a553310

	this.parameterPropertyHandlers = [
	new ParameterPropertyHandlerDefaultScoped(this.objectLoader),
	new ParameterPropertyHandlerDefault(this.objectLoader),
	new ParameterPropertyHandlerFixed(this.objectLoader),
	this.parameterPropertyHandlerRange = new ParameterPropertyHandlerRange(this.objectLoader, options.typeChecking),
	new ParameterPropertyHandlerLazy(),
	];

[rubensworks]

Oh, I see. In that case, you can ignore my comment.

[joachimvh]

Everything seems to work fine when testing with Comunica.

[rubensworks]

Released as 5.5.0.