Add class to align crate icon with crate name in heading

Author: p-jackson

app/templates/crate/version.hbs

@@ -3,7 +3,7 @@
 <div id='crates-heading' data-test-heading>
     <div class="wide">
         <div class='info'>
-            {{svg-jar "crate"}}
+            {{svg-jar "crate" class='crate-icon'}}
             <h1 data-test-crate-name>{{ crate.name }}</h1>
             <h2 data-test-crate-version>{{ currentVersion.num }}</h2>
         </div>