Update scala-library to 2.12.19

Author: scala-steward-bot

build.sbt

@@ -4,7 +4,7 @@ organization := "com.github.takezoe"
 
 scalaVersion := "3.3.2"
 
-crossScalaVersions := List("2.12.18", "2.13.12", "3.3.2")
+crossScalaVersions := List("2.12.19", "2.13.12", "3.3.2")
 
 libraryDependencies += {
   if (scalaBinaryVersion.value == "3") {