Update the minimum Julia version to v1.12

Author: inkydragon

Project.toml

@@ -8,7 +8,7 @@ StyledStrings = "f489334b-da3d-4c2e-b8f0-e476e12c162b"
 
 [compat]
 StyledStrings = "1.0"
-julia = "1.11"
+julia = "1.12"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"