Make tag = :hash the default on Julia 1.11+

Author: topolarity

src/config.jl

@@ -105,7 +105,14 @@ Base.eltype(cfg::AbstractConfig) = eltype(typeof(cfg))
 
 function maketag(kind::Union{Symbol,Nothing}, f, X)
     if kind === :default
-        return Tag(f, X)
+        @static if VERSION ≥ v"1.11"
+            return SmallTag(f, X)
+        else
+            # On ≤1.10, the hash of a type cannot be computed at compile-time,
+            # making `SmallTag(...)` type-unstable, so `Tag(...)` is left as
+            # as the default.
+            return Tag(f, X)
+        end
     elseif kind === :type
         return Tag(f, X)
     elseif kind === :hash