Update Gemfile.lock with rex-socket bump

Rex' sockets gem now includes the methods used in this PR for
determining if a string represents an IP address, whether it's v4
or 6.

Bump the version contained in Gemfile.lock to permit more testing

Author: RageLtMan

Gemfile.lock

@@ -301,7 +301,7 @@ GEM
       metasm
       rex-core
       rex-text
-    rex-socket (0.1.6)
+    rex-socket (0.1.7)
       rex-core
     rex-sslscan (0.1.4)
       rex-socket