improve cheatsheet

Author: luizbills

public/about.html

@@ -190,7 +190,7 @@ <h1>LITECANVAS</h1>
 
       <h2>Hello World</h2>
 
-      <pre><code class="language-html">&lt;!-- create a text file named "index.html" and open it your browser --&gt;
+      <pre><code class="language-html" onclick="selectText(this)">&lt;!-- create a text file named "index.html" and open it your browser --&gt;
 &lt;!DOCTYPE html&gt;
 &lt;html&gt;
   &lt;body&gt;
@@ -213,7 +213,7 @@ <h2>Hello World</h2>
 
       <h2>Basic boilerplate</h2>
 
-      <pre><code class="language-typescript">litecanvas({
+      <pre><code class="language-typescript" onclick="selectText(this)">litecanvas({
   loop: {
     init, update, draw, resized,
     tap, tapping, untap, tapped
@@ -719,7 +719,7 @@ <h3>Public assets</h3>
         >
       </p>
 
-      <pre><code class="language-typescript">let sprites;
+      <pre><code class="language-typescript" onclick="selectText(this)">let sprites;
 
 litecanvas({
   pixelart: true
@@ -758,7 +758,7 @@ <h3>Public assets</h3>
         >
       </p>
 
-      <pre><code class="language-typescript">litecanvas()
+      <pre><code class="language-typescript" onclick="selectText(this)">litecanvas()
 
 function init() {
   // first, load the font

public/sw.js

@@ -1,5 +1,5 @@
 const cacheName = "luizbills.litecanvas-editor-v1";
-const version = "2.47.0";
+const version = "2.47.1";
 
 const precacheResources = [
   "/",