Update dependency vanilla-lazyload to v17.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
vanilla-lazyload (source)	17.6.1 -> 17.9.0

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Release Notes

verlok/vanilla-lazyload (vanilla-lazyload)

v17.9.0

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• Allowing to pass empty string ("") as value for class options (class_loading, class_applied, class_loaded, class_error, class_entered, class_exited) so that no DOM mutation will happen if not necessary. This is a potential performance improvement. Suggested in #​605.

v17.8.8

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• Fixed dependency issues detected by npm audit

v17.8.5

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• Improved callbacks check by introducing type check (must be function)

v17.8.4

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• Updated link to demos in the documentation.

v17.8.3

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• Fixed callback_error in background images demos, like suggested in #​573. Thanks to @​Soul244.

v17.8.2

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• Fixed a bug which occurred if the network connection went off and on again after a LazyLoad instance was destroyed

v17.8.1

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• Updated Typescript typings

v17.7.0

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• Added the new option restore_on_error to restore original attributes on error.

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