chore(renovate): correct config w/ rangeStrategy, issue title & labels

[stijnmoreels]

The renovate.json has some additional options that we can use to improve the dependency dashborad GitHub issue.

• Adds dependencies and management labels to the created PR's so that it always clear that this should be taken up by the code-owners.
• Use rangeStrategy:widen to 'widen' any package ranges we have ('increase' was not valid).
• Use a configured title for the issue, so that it is more clear what this is (includes 'Renovate' in the title).
• Adds a $schema property, so that we have intelesense when editing locally.

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