Can not create release if patterns matches multiple files with the same name.

Reproduce the GitLab release upload with two same-basename files under different directories, then trace how upload paths are formed relative to pkgRoot. Done means both assets can be uploaded without GitLab returning the duplicate-link 400 response, with the failure no longer silent.

I'm getting this error,

[12:29:11 PM] [semantic-release] [@semantic-release/gitlab] › ✖  An error occurred while making a request to the GitLab release API:
HTTPError: Response code 400 (Bad Request)
    at EventEmitter.<anonymous> (/home/ecarroll/n/lib/node_modules/@semantic-release/gitlab/node_modules/got/dist/source/as-promise.js:118:31)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
[12:29:11 PM] [semantic-release] › ✖  Failed step "publish" of plugin "@semantic-release/gitlab"
[12:29:11 PM] [semantic-release] › ✖  An error occurred while running semantic-release: HTTPError: Response code 400 (Bad Request)
    at EventEmitter.<anonymous> (/home/ecarroll/n/lib/node_modules/@semantic-release/gitlab/node_modules/got/dist/source/as-promise.js:118:31)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5) {
  pluginName: '@semantic-release/gitlab'
}
HTTPError: Response code 400 (Bad Request)
    at EventEmitter.<anonymous> (/home/ecarroll/n/lib/node_modules/@semantic-release/gitlab/node_modules/got/dist/source/as-promise.js:118:31)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5) {
  pluginName: '@semantic-release/gitlab'
}%

This error comes right after a release PUSH. Currently it's silently failing failing I opened this ticket to fix the silent failing: https://github.com/semantic-release/gitlab/issues/264

{
  responseType: 'text',
  body: '{"message":"Validation failed: Links have duplicate values (acme-angular-validators.js) for #\\u003cRelease:0x00007f0702a43908\\u003e scope"}'
}

You can see here that the problem is that GitLab errors with 400 (Bad Request) because it's upload multiple files (in different directories) to the release API.

dist/acme/angular-validators/fesm2015/acme-angular-validators.js
dist/acme/angular-validators/esm2015/acme-angular-validators.js

I believe the solution for this should be to add the paths to the file's basename, relatively to the pkgRoot.