Update dependencies per #819

Author: rebeccahum

composer.json

@@ -18,10 +18,10 @@
 	"require": {
 		"php": ">=5.4",
 		"phpcsstandards/phpcsextra": "^1.2.1",
-		"phpcsstandards/phpcsutils": "^1.0.9",
-		"sirbrillig/phpcs-variable-analysis": "^2.11.17",
-		"squizlabs/php_codesniffer": "^3.8.0",
-		"wp-coding-standards/wpcs": "^3.0"
+		"phpcsstandards/phpcsutils": "^1.0.11",
+		"sirbrillig/phpcs-variable-analysis": "^2.11.18",
+		"squizlabs/php_codesniffer": "^3.9.2",
+		"wp-coding-standards/wpcs": "^3.1.0"
 	},
 	"require-dev": {
 		"php-parallel-lint/php-parallel-lint": "^1.3.2",