[sw-fw-less] Update to php 7.4 (#6123)

* [sw-fw-less] Update to php 7.4

* MAINTAINER deprecated, changed to label

* Update readme versions

frameworks/PHP/sw-fw-less/README.md

@@ -22,8 +22,8 @@ This is the [Sw-Fw-Less](https://github.com/luoxiaojun1992/sw-fw-less) portion o
 
 ## Infrastructure Software Versions
 The tests were run with:
-* [PHP 7.1](https://www.php.net/)
-* [Swoole v4.4.0](https://www.swoole.com/)
+* [PHP 7.4](https://www.php.net/)
+* [Swoole v4.5.6](https://www.swoole.com/)
 
 ## Test URLs
 ### JSON Encoding Test

frameworks/PHP/sw-fw-less/sw-fw-less.dockerfile

@@ -1,4 +1,4 @@
-FROM php:7.3
+FROM php:7.4
 
 RUN pecl install swoole > /dev/null && \
     docker-php-ext-enable swoole
@@ -30,4 +30,4 @@ EXPOSE 9501
 
 ENTRYPOINT ["php", "/var/www/sw-fw-less/start.php"]
 
-MAINTAINER luoxiaojun1992 <[email protected]>
+LABEL luoxiaojun1992 <[email protected]>