Auto merge of #1951 - Turbo87:temp-lint, r=locks

Update `ember-template-lint` to v1.12.1

see https://github.com/ember-template-lint/ember-template-lint/blob/v1.12.1/CHANGELOG.md ✨

Author: bors

.template-lintrc.js

@@ -7,7 +7,8 @@ module.exports = {
 
   rules: {
     'img-alt-attributes': false,
-    'triple-curlies': false,
-    'html-comments': false,
+    'no-html-comments': false,
+    'no-unnecessary-concat': false,
+    quotes: false,
   },
 };

app/templates/application.hbs

@@ -6,7 +6,7 @@
 <nav id="header">
   {{#link-to "index" tabindex="-1"}}
     <img src="/assets/Cargo-Logo-Small.png" id="logo"
-         height=100 width=100 alt="Cargo Logo">
+         height="100" width="100" alt="Cargo Logo">
   {{/link-to}}
   {{#link-to "index"}}
     <h1>