Update phpdoc

Author: GitHub Actions

docs/css/template.css

@@ -273,3 +273,6 @@
 .phpdocumentor-tag-link {
     margin-right: var(--spacing-sm);
 }
+.phpdocumentor-uml-diagram svg {
+    cursor: zoom-in;
+}

docs/index.html

@@ -5,7 +5,7 @@
             <title>BitPay PHP SDK</title>
 
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    
+    <base href="./">
     <link rel="icon" href="images/favicon.ico"/>
     <link rel="stylesheet" href="css/normalize.css">
     <link rel="stylesheet" href="css/base.css">

docs/js/template.js

@@ -15,3 +15,20 @@
         observer.observe(el);
     })
 })();
+function openSvg(svg) {
+    // convert to a valid XML source
+    const as_text = new XMLSerializer().serializeToString(svg);
+    // store in a Blob
+    const blob = new Blob([as_text], { type: "image/svg+xml" });
+    // create an URI pointing to that blob
+    const url = URL.createObjectURL(blob);
+    const win = open(url);
+    // so the Garbage Collector can collect the blob
+    win.onload = (evt) => URL.revokeObjectURL(url);
+};
+
+
+var svgs = document.querySelectorAll(".phpdocumentor-uml-diagram svg");
+for( var i=0,il = svgs.length; i< il; i ++ ) {
+    svgs[i].onclick = (evt) => openSvg(evt.target);
+}