Make the credis requirements less strict.

Since credis has moved forward, but is backwards compatible, resque
shouldn’t be so strict towards an old version because other libraries
need newer credis features.

Author: tburry

composer.json

@@ -20,7 +20,7 @@
 	"require": {
 		"php": ">=5.3.0",
 		"ext-pcntl": "*",
-		"colinmollenhour/credis": "1.2.*",
+		"colinmollenhour/credis": "~1.2",
 		"psr/log": "1.0.0"
 	},
 	"suggest": {