Update Beautiful Jekyll to the latest commit version

_includes/search.html

@@ -0,0 +1,19 @@
+{% if site.post_search %}
+
+<div id="beautifuljekyll-search-overlay">
+
+  <div id="nav-search-exit" title="Exit search">✕</div>
+  <input type="text" id="nav-search-input" placeholder="Search">
+  <ul id="search-results-container"></ul>
+  
+  <script src="https://unpkg.com/simple-jekyll-search@latest/dest/simple-jekyll-search.min.js"></script>
+  <script>
+    SimpleJekyllSearch({
+      searchInput: document.getElementById('nav-search-input'),
+      resultsContainer: document.getElementById('search-results-container'),
+      json: '{{ site.baseurl }}/assets/data/searchcorpus.json' 
+    });
+  </script>
+</div>
+
+{% endif %}