Update composer dependencies.

- symfony/console: 2.7.*@dev -> ~2.7@dev
- tomzx/php-semver-checker: 0.5.*@dev -> ~0.5

Author: tomzx

composer.json

@@ -35,8 +35,8 @@
 		"herrera-io/phar-update": "~2.0",
 		"klaussilveira/gitter": "dev-php-semver-checker",
 		"nikic/php-parser": "dev-features/php-semver-checker",
-		"symfony/console": "2.7.*@dev",
-		"tomzx/php-semver-checker": "0.5.*@dev",
+		"symfony/console": "~2.7@dev",
+		"tomzx/php-semver-checker": "~0.5",
 		"vierbergenlars/php-semver": "~3.0"
 	},
 	"require-dev": {