Update Leaflet library to the latest version v1.7.1

[dchubar-fj]

Steps for review

• [x] Make sure Location finder works fine when the Leaflet provider is used

General checks

• [ ] All coding styles are fulfilled and there are no any issues reported by CodeSniffer. See Code of Conduct.
• [ ] Try to use Conventional commit messages accordingly to the standard https://www.conventionalcommits.org/en/v1.0.0/#specification
• [ ] Documentation has been updated according to PR changes.
• [ ] Steps for review have been provided according to PR changes.
  
• [ ] Make sure you've provided all necessary hook_update_N to support upgrade path.
• [ ] Make sure your git email is associated with account on drupal.org, otherwise you won't get commits there.
  
• [ ] If you would like to get credits on drupal.org, check documentation.

Thank you for your contribution!

[gundevel]

Build comment file:

Check Open Y Installation Wizard at http://install.openy.cibox.tools/build3293/install.php

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Test PASSed. Refer to this link for build results (access rights to CI server needed): http://openy.cibox.tools:8080/job/PR_BUILDER_COMPOSER/3293/

[gundevel]

Open Y Upgrade Path site check installed at http://upgrade.openy.cibox.tools/build3293/

[podarok]

Does work