Add correct role to interactive element

Co-authored-by: Garret Alfert <alfert@wevelop.de>

.template-lintrc.js

@@ -6,7 +6,6 @@ module.exports = {
   rules: {
     'simple-unless': false,
     'no-nested-interactive': false,
-    'no-invalid-interactive': false,
     'no-html-comments': false
   },
 

app/components/reimbursement-item/template.hbs

@@ -1,6 +1,6 @@
 <li data-reimbursement-id={{@reimbursement.id}}
     class="{{item-status @reimbursement}}"
-    {{on "click" this.toggleExpenseDetails}}>
+    role="button" {{on "click" this.toggleExpenseDetails}}>
   <p class="meta">
     <span class="recipient">
       <UserAvatar @contributor={{@reimbursement.contributor}} />