Fix fatal error in invalid plugin update offer (#354)

* Ignore plugin update offer if version is invalid

* Fix PHPCS issues

Author: danielbachhuber

src/WP_CLI/CommandWithUpgrade.php

@@ -631,7 +631,11 @@ private function get_minor_or_patch_updates( $items, $type, $insecure, $require_
 			$update_version = false;
 			$update_package = false;
 			foreach ( $data['versions'] as $version => $download_link ) {
-				$update_type = Utils\get_named_sem_ver( $version, $item['version'] );
+				try {
+					$update_type = Utils\get_named_sem_ver( $version, $item['version'] );
+				} catch ( \Exception $e ) {
+					continue;
+				}
 				// Compared version must be older.
 				if ( ! $update_type ) {
 					continue;