Update collection format docs to include Delphi 12

Fixes #26

Documented addition of Delphi 12 to list of supported compilers using
key name "Delphi12A".

Author: delphidabbler

docs/collection-format.html

@@ -202,6 +202,7 @@ <h2 id="category-ini">
 Delphi103R=&lt;&quot;Y&quot;|&quot;N&quot;|&quot;Q&quot;|&quot;W&quot;&gt; [~>2.2]
 Delphi104S=&lt;&quot;Y&quot;|&quot;N&quot;|&quot;Q&quot;|&quot;W&quot;&gt; [~>2.2]
 Delphi11A=&lt;&quot;Y&quot;|&quot;N&quot;|&quot;Q&quot;|&quot;W&quot;&gt; [~>2.2]
+Delphi12A=&lt;&quot;Y&quot;|&quot;N&quot;|&quot;Q&quot;|&quot;W&quot;&gt; [~>2.2]
 FPC=&lt;&quot;Y&quot;|&quot;N&quot;|&quot;Q&quot;|&quot;W&quot;&gt;
 Kind=&lt;&quot;freeform&quot;|&quot;routine&quot;|&quot;type&quot;|&quot;const&quot;|&quot;class&quot;|&quot;unit&quot;&gt;
 TestInfo=&lt;&quot;none&quot;|&quot;basic&quot;|&quot;advanced&quot;&gt;
@@ -406,6 +407,7 @@ <h2 id="category-ini">
         <li><code class="key">Delphi103R</code> – Delphi 10.3 Rio compiler <strong>[~>2.2]</strong></li>
         <li><code class="key">Delphi104S</code> – Delphi 10.4 Sydney compiler <strong>[~>2.2]</strong></li>
         <li><code class="key">Delphi11A</code> – Delphi 11.x Alexandria compiler <strong>[~>2.2]</strong></li>
+        <li><code class="key">Delphi12A</code> – Delphi 12.x Athens compiler <strong>[~>2.2]</strong></li>
         <li><code class="key">FPC</code> – Free Pascal compiler</li>
       </ul>
       <p>