Update squizlabs/php_codesniffer requirement from 3.3.0 to 3.3.2 (#2)

Updates the requirements on [squizlabs/php_codesniffer](https://github.com/squizlabs/PHP_CodeSniffer) to permit the latest version.
- [Release notes](https://github.com/squizlabs/PHP_CodeSniffer/releases)
- [Commits](https://github.com/squizlabs/PHP_CodeSniffer/commits/3.3.2)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -5,7 +5,7 @@
     "require": {
         "humanmade/coding-standards": "0.5.0",
         "fig-r/psr2r-sniffer": "0.5.0",
-        "squizlabs/php_codesniffer": "3.3.0"
+        "squizlabs/php_codesniffer": "3.3.2"
     },
     "require-dev": {
         "phpunit/phpunit": "6.5.8"