Added note about the deprecation of jQuery.isFunction in version 3.3

Fixes gh-1074

Author: AurelioDeRosa

categories.xml

@@ -70,6 +70,11 @@
       <desc><![CDATA[All the aspects of the API that were deprecated in the corresponding version of jQuery.
         <p>For more information, see the Release Notes/Changelog at <a href="http://blog.jquery.com/2016/06/09/jquery-3-0-final-released/">http://blog.jquery.com/2016/06/09/jquery-3-0-final-released/</a></p>
       ]]></desc>
+    </category>
+	<category name="Deprecated 3.3" slug="deprecated-3.3">
+      <desc><![CDATA[All the aspects of the API that were deprecated in the corresponding version of jQuery.
+        <p>For more information, see the Release Notes/Changelog at <a href="http://blog.jquery.com/2018/01/19/jquery-3-3-0-a-fragrant-bouquet-of-deprecations-and-is-that-a-new-feature/</a></p>
+      ]]></desc>
     </category>
   </category>
   <category name="Dimensions" slug="dimensions">

entries/jQuery.isFunction.xml

@@ -1,14 +1,15 @@
 <?xml version="1.0"?>
-<entry type="method" name="jQuery.isFunction" return="boolean">
+<entry type="method" name="jQuery.isFunction" return="boolean" deprecated="3.3">
   <title>jQuery.isFunction()</title>
   <signature>
     <added>1.2</added>
     <argument name="obj" type="PlainObject">
       <desc>Object to test whether or not it is a function.</desc>
     </argument>
   </signature>
-  <desc>Determine if the argument passed is a JavaScript function object. </desc>
+  <desc>Determine if the argument passed is a JavaScript function object.</desc>
   <longdesc>
+    <p>As of jQuery 3.3, <code>jQuery.isFunction()</code> has been deprecated. In most cases, its use can be replaced by <code>typeof obj === "function"</code>.</p>
     <p><strong>Note:</strong> As of jQuery 1.3, functions provided by the browser like <code>alert()</code> and DOM element methods like <code>getAttribute()</code> are not guaranteed to be detected as functions in browsers such as Internet Explorer.</p>
   </longdesc>
   <example>
@@ -57,4 +58,5 @@ true
   </example>
   <category slug="utilities"/>
   <category slug="version/1.2"/>
+  <category slug="deprecated/deprecated-3.3"/>
 </entry>