Correct typeo in function name 'seporate' -> 'separate'

Version bumber to 4v4.2.0

Author: pattonwebz

CHANGELOG.md

@@ -1,5 +1,8 @@
 #CHANGELOG
 
+## [4.2.0]
+- Fix typo in function name 'seporate'->'separate' (private function, no need to add back-compat).
+
 ## [4.1.0]
 - Prevent error `trying to get property of non-object` when no menu is set to a location using the walker.
 - Add `$depth` as 4th parameter passed to `nav_menu_link_attributes`.

class-wp-bootstrap-navwalker.php

@@ -116,7 +116,7 @@ public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0
 			 * NOTE: linkmod and icon class arrays are passed by reference and
 			 * are maybe modified before being used later in this function.
 			 */
-			$classes = self::seporate_linkmods_and_icons_from_classes( $classes, $linkmod_classes, $icon_classes, $depth );
+			$classes = self::separate_linkmods_and_icons_from_classes( $classes, $linkmod_classes, $icon_classes, $depth );
 
 			// Join any icon classes plucked from $classes into a string.
 			$icon_class_string = join( ' ', $icon_classes );
@@ -396,7 +396,7 @@ public static function fallback( $args ) {
 		 *
 		 * @return array  $classes         a maybe modified array of classnames.
 		 */
-		private function seporate_linkmods_and_icons_from_classes( $classes, &$linkmod_classes, &$icon_classes, $depth ) {
+		private function separate_linkmods_and_icons_from_classes( $classes, &$linkmod_classes, &$icon_classes, $depth ) {
 			// Loop through $classes array to find linkmod or icon classes.
 			foreach ( $classes as $key => $class ) {
 				// If any special classes are found, store the class in it's