Fix @deprecated notice for Pico::getBaseThemeUrl() and AbstractPicoPlugin::__call()

lib/AbstractPicoPlugin.php

@@ -198,7 +198,7 @@ abstract class AbstractPicoPlugin implements PicoPluginInterface
      *
      * @see PicoPluginInterface::getPico()
      *
-     * @deprecated 3.0.0
+     * @deprecated 2.1.0
      *
      * @param string $methodName name of the method to call
      * @param array  $params     parameters to pass

lib/Pico.php

@@ -2253,7 +2253,7 @@ class Pico
      *
      * @see Pico::getUrlFromPath()
      *
-     * @deprecated 3.0.0
+     * @deprecated 2.1.0
      *
      * @return string
      */