use markup validator from original source

3.0-php7.3/Dockerfile

@@ -44,13 +44,12 @@ WORKDIR /opt/codeception
 
 
 RUN composer init --no-interaction --name team23/codeception --require codeception/codeception:^3 \
-    && composer config repositories.markupvalidator vcs https://github.com/mmunz/codeception-markup-validator.git \
     && composer config minimum-stability dev \
     && composer config prefer-stable true
 
 RUN  if [ -n "${GITHUB_CI_TOKEN}" ]; then composer config --global github.accesstoken ${GITHUB_CI_TOKEN}; fi
 
-RUN composer require kolyunya/codeception-markup-validator:3.0.2 captbaritone/mailcatcher-codeception-module \
+RUN composer require kolyunya/codeception-markup-validator:3.1.0 captbaritone/mailcatcher-codeception-module \
     && composer install --no-interaction --optimize-autoloader --apcu-autoloader
 
 ENV PATH /opt/codeception/vendor/bin:${PATH}