Fixes #453. Clarify java-uuid-provider dependency requirements in readme

README.md

@@ -93,6 +93,7 @@ If you get `ClassNotFoundException`/`NoClassDefFoundError`/`NoSuchMethodError` a
 * logback-classic (required for logging _LoggingEvents_)
 * logback-access (required for logging _AccessEvents_)
 * slf4j-api
+* java-uuid-generator (required if the `uuid` provider is used)
 
 Older versions than the ones specified in the pom file _might_ work, but the versions in the pom file are what testing has been performed against.
 
@@ -2025,6 +2026,7 @@ For LoggingEvents, the available providers and their configuration properties (d
           </ul></li>
           <li><tt>ethernet</tt> - Only for 'time' strategy. When defined - MAC address to use for location part of UUID. Set it to <tt>interface</tt> value to use real underlying network interface or to specific values like <tt>00:C0:F0:3D:5B:7C</tt></li>          
         </ul>
+	      <p>Note: The <a href="https://mvnrepository.com/artifact/com.fasterxml.uuid/java-uuid-generator/"><tt>com.fasterxml.uuid:java-uuid-generator</tt></a> optional dependency must be added to applications that use the `uuid` provider.</p>
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