Upgrade angular-file-uploader to v2.6.1

[colemanw]

Overview

Upgrades an Angular plugin that is only used by the CiviCase extension, in preparation for also using it in Afform.

Before

AngularFileUploader v1.1.6

After

AngularFileUploader v2.6.1

Technical Details

I couldn't find any release notes about breaking changes, and I tested the CiviCase extension and the drag-n-drop file uploads work fine before and after.

[civibot]

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[totten]

@colemanw This seems look a good idea. FWIW, I grepped universe and couldn't find any consumers besides CiviCase and crmAttachment / crm-attachments. For crmAttachment, I did an r-run on the autobuild site (via "Mailings => New Mailing =>Attachments"), and that seemed ok.

[totten]

Not sure what to make of the r-test failures though.

[seamuslee001]

I think the test problem is this line hasn't been altered https://github.com/civicrm/civicrm-core/blob/master/karma.conf.js#L39

[colemanw]

That's it, thanks @seamuslee001

[totten]

@colemanw Merge conflict on composer.lock. Otherwise MOP