Update Ranch to 1.2.1

Makefile

@@ -19,7 +19,7 @@ LOCAL_DEPS = crypto
 
 DEPS = cowlib ranch
 dep_cowlib = git https://github.com/ninenines/cowlib master
-dep_ranch = git https://github.com/ninenines/ranch 1.1.0
+dep_ranch = git https://github.com/ninenines/ranch 1.2.1
 
 TEST_DEPS = ct_helper gun
 dep_ct_helper = git https://github.com/extend/ct_helper master