Fixes error:
$ ./tests/check_coding_standards.sh
PHP_CodeSniffer version 3.7.1 (stable) by Squiz (http://www.squiz.net)
ERROR: Referenced sniff "PHPCS23Utils" does not exist
Run "phpcs --help" for usage information
Error: found standard violation(s)
Comment out installed_paths config to fix error:
$ ./tests/check_coding_standards.sh
PHP_CodeSniffer version 3.7.1 (stable) by Squiz (http://www.squiz.net)
ERROR: Referenced sniff "PHPCS23Utils" does not exist
Run "phpcs --help" for usage information
Error: found standard violation(s)