Update Scala to 3.4.0 (#22)

Author: Kordyjan

README.md

@@ -16,7 +16,7 @@ IntelliJ](https://blog.jetbrains.com/scala/).
 ### build.sc
 
 ```scala
-def scalaVersion = "3.3.1"
+def scalaVersion = "3.4.0"
 ```
 
 ### Getting your project to compile with Scala 3

build.sc

@@ -1,5 +1,5 @@
 import mill._, scalalib._
 
 object examples extends ScalaModule {
-  def scalaVersion = "3.3.1"
+  def scalaVersion = "3.4.0"
 }