GUACAMOLE-220: Upgrade to latest versions of jQuery and Lodash.

The version of Lodash previously included with Guacamole lacks the
sortedIndexOf() function, which is needed by the identity set editor
directive for manipulating sorted arrays of identifiers.

If upgrading Lodash, may as well upgrade jQuery while we're at it. The
version previously included within Guacamole is no longer maintained.

guacamole/pom.xml

@@ -308,7 +308,7 @@
         <dependency>
             <groupId>org.webjars.bower</groupId>
             <artifactId>lodash</artifactId>
-            <version>2.4.1</version>
+            <version>4.17.10</version>
             <scope>runtime</scope>
         </dependency>
 
@@ -316,7 +316,7 @@
         <dependency>
             <groupId>org.webjars.bower</groupId>
             <artifactId>jquery</artifactId>
-            <version>2.1.3</version>
+            <version>3.3.1</version>
             <scope>runtime</scope>
         </dependency>