Use latest Marten version

Author: ellmetha

shard.lock

@@ -2,7 +2,7 @@ version: 2.0
 shards:
   ameba:
     git: https://github.com/crystal-ameba/ameba.git
-    version: 1.7.0-dev+git.commit.356c4bb7a45d23cfc281af1277271b8691101824
+    version: 1.7.0-dev+git.commit.fe12a7566ac6c0f5b7b63ad07b89fb17a5ebf6f7
 
   any_hash:
     git: https://github.com/sija/any_hash.cr.git
@@ -30,7 +30,7 @@ shards:
 
   marten:
     git: https://github.com/martenframework/marten.git
-    version: 0.5.6
+    version: 0.5.7
 
   marten_raven_middleware:
     git: https://github.com/ellmetha/marten-raven-middleware.git