Update scala-library, scala-reflect to 2.12.18 (#255)

* Update scala-library, scala-reflect to 2.12.18

* Revert commit(s) 0cc6fdf

* Update scala-library, scala-reflect to 2.12.18

Author: scala-steward

build.sbt

@@ -8,7 +8,7 @@ organization := "com.github.swagger-akka-http"
 
 ThisBuild / scalaVersion := "2.13.11"
 
-ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.17", "2.13.11", "3.3.0")
+ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.18", "2.13.11", "3.3.0")
 
 ThisBuild / organizationHomepage := Some(url("https://github.com/swagger-akka-http/swagger-scala-module"))