tlBaseVersion should be 1.4 for 1.4.0 release

Author: benhutchison

build.sbt

@@ -6,7 +6,7 @@ ThisBuild / organization := "org.typelevel"
 ThisBuild / organizationName := "Typelevel"
 ThisBuild / licenses := List(License.MIT)
 ThisBuild / startYear := Some(2016)
-ThisBuild / tlBaseVersion := "1.3"
+ThisBuild / tlBaseVersion := "1.4"
 ThisBuild / scalaVersion := Scala213
 ThisBuild / crossScalaVersions := Seq(Scala212, Scala3, Scala213)
 ThisBuild / tlVersionIntroduced := Map("3" -> "1.0.3")