Add query arg to suggestionTemplate function

[andygout]

This PR modifies the templateSuggestion function to take an additional query parameter (the text which was typed into the autocomplete text input field by the user).

This means that the Origami o-autocomplete component (which relies on accessible-autocomplete) can provide a suggestionTemplate in the options when instantiating an instance of oAutocomplete which can use that query value in its callback.

This will enable a customised rendering of suggestion items whilst retaining the ability to apply highlighting (for which the query value is necessary) on the option value (or, in the scenario of it being an object, values thereof).

Dependent PRs

• Align with current latest alphagov/accessible-autocomplete repo #28

Dependent PRs

• feat: Add query parameter to custom suggestionTemplate function origami#1516

TODO

• If possible, make this same PR against the source repo (https://github.com/alphagov/accessible-autocomplete) — I do not have write permissions (ERROR: Permission to alphagov/accessible-autocomplete.git denied to andygout), and based on this commit, I think only Jake Champion had them, @notlee? Though it may not be reviewed in any case based on Types of support we can provide. alphagov/accessible-autocomplete#430.
  • This is with an aim to deleting this repo and using that source repo as o-autocomplete's dependency (more detail here: Align with current latest alphagov/accessible-autocomplete repo #28).

Release

This adds functionality in a backwards-compatible manner so I propose to release these changes as a minor version.