Revert "Bump dependencies"

shard.lock

@@ -18,7 +18,7 @@ shards:
 
   lsquic:
     git: https://github.com/iv-org/lsquic.cr.git
-    version: 2.23.1
+    version: 2.18.1-1
 
   pg:
     git: https://github.com/will/crystal-pg.git

shard.yml

@@ -27,7 +27,7 @@ dependencies:
     version: ~> 0.1.3
   lsquic:
     github: iv-org/lsquic.cr
-    version: ~> 2.23.1
+    version: ~> 2.18.1-1
 
 crystal: 0.36.1