Update shard.lock

shard.lock

@@ -2,11 +2,11 @@ version: 1.0
 shards:
   db:
     github: crystal-lang/crystal-db
-    version: 0.4.3
+    version: 0.5.0
 
   kemal:
     github: kemalcr/kemal
-    commit: 8cb9770ec3c6cf5897e644229dad8d0b5c360941
+    commit: 50f82f51874babe92cbb808013647a7989d54354
 
   kilt:
     github: jeromegn/kilt
@@ -14,7 +14,7 @@ shards:
 
   pg:
     github: will/crystal-pg
-    commit: cafe58314bbbf0e6273963b1447e1c2fbeaf41ff
+    commit: cafe7b42bcabd27ef55f065412e7d1d6e6e9a968
 
   radix:
     github: luislavena/radix