Updates for 2.12.4.

Author: milessabin

README.md

@@ -45,9 +45,9 @@ which indicates the Typelevel feature level beyond the baseline compiler. We are
 Typelevel features across the Scala compiler versions we support.
 
 The current Typelevel feature level is 4 and it is avaliable as a drop in replacement for Lightbend Scala 2.11.11, 
-2.12.3 and 2.13.0-M2. Full release notes are available,
+2.12.4 and 2.13.0-M2. Full release notes are available,
 
-+ Typelevel Scala 4 [2.11.11/2.12.3/2.13.0-M2](https://github.com/typelevel/scala/blob/typelevel-readme/notes/typelevel-4.md).
++ Typelevel Scala 4 [2.11.11/2.12.4/2.13.0-M2](https://github.com/typelevel/scala/blob/typelevel-readme/notes/typelevel-4.md).
 
 Support for Scala 2.10.6 will be considered if sponsors step forward to support the necessary work.
 
@@ -77,10 +77,10 @@ relevant to practitioners.
 
 ## Try Typelevel Scala with an Ammonite instant REPL
 
-The quickest way to get to a Typelevel Scala 2.12.3 REPL path is to run the provided
+The quickest way to get to a Typelevel Scala 2.12.4 REPL path is to run the provided
 ["try Typelevel Scala"][try-tls] script, which has no dependencies other than an installed JDK. This script
 downloads and installs [coursier][coursier] and uses it to fetch the [Ammonite][ammonite] REPL and Typelevel Scala
-2.12.3. It then drops you immediately into a REPL session,
+2.12.4. It then drops you immediately into a REPL session,
 
 ```text
 % curl -s https://raw.githubusercontent.com/typelevel/scala/typelevel-readme/try-typelevel-scala.sh | bash
@@ -89,7 +89,7 @@ Compiling (synthetic)/ammonite/predef/interpBridge.sc
 Compiling (synthetic)/ammonite/predef/replBridge.sc
 Compiling (synthetic)/ammonite/predef/DefaultPredef.sc
 Welcome to the Ammonite Repl 1.0.1
-(Scala 2.12.3-bin-typelevel-4 Java 1.8.0_144)
+(Scala 2.12.4-bin-typelevel-4 Java 1.8.0_144)
 If you like Ammonite, please support our development at www.patreon.com/lihaoyi
 @ repl.compiler.settings.YliteralTypes.value = true
 
@@ -124,7 +124,7 @@ res6: Int = 23
 
 Requirements for using Typelevel Scala in your existing projects,
 
-+ You must be using Lightbend Scala 2.11.11, 2.12.3 or 2.13.0-M2.
++ You must be using Lightbend Scala 2.11.11, 2.12.4 or 2.13.0-M2.
 + You must be using SBT 0.13.13 or later.
 + Your build should use `scalaOrganization.value` and `CrossVersion.patch` appropriately.
 
@@ -136,15 +136,15 @@ Requirements for using Typelevel Scala in your existing projects,
   ```
   inThisBuild(Seq(
     organization := "com.chuusai",
-    scalaVersion := "2.12.3",
-    crossScalaVersions := Seq("2.10.6", "2.11.11", "2.12.3", "2.13.0-M2")
+    scalaVersion := "2.12.4",
+    crossScalaVersions := Seq("2.10.6", "2.11.11", "2.12.4", "2.13.0-M2")
   ))
   ```
 
 You can now temporarily build with Typelevel Scala by entering,
 
 ```
-> ; set every scalaOrganization := "org.typelevel" ; ++2.12.3-bin-typelevel-4
+> ; set every scalaOrganization := "org.typelevel" ; ++2.12.4-bin-typelevel-4
 ```
 
 on the SBT REPL.
@@ -154,7 +154,7 @@ To switch your project permanently to Typelevel Scala 4 update your `build.sbt`
 ```
 inThisBuild(Seq(
   scalaOrganization := "org.typelevel",
-  scalaVersion := "2.12.3-bin-typelevel-4"
+  scalaVersion := "2.12.4-bin-typelevel-4"
 ))
 ```
 
@@ -165,7 +165,7 @@ following content,
 ```
 inThisBuild(Seq(
   scalaOrganization := "org.typelevel",
-  scalaVersion      := "2.12.3-bin-typelevel-4"
+  scalaVersion      := "2.12.4-bin-typelevel-4"
 ))
 ```
 
@@ -178,7 +178,7 @@ of the Lightbend one. You can verify that the settings have been updated correct
 > show scalaOrganization
 [info] org.typelevel
 > show scalaVersion
-[info] 2.12.3-bin-typelevel-4
+[info] 2.12.4-bin-typelevel-4
 ```
 
 [build-tweaks-1]: https://github.com/typelevel/scala/issues/135
@@ -195,7 +195,7 @@ If you are using maven with the `scala-maven-plugin`, set the `<scalaOrganizatio
   <version>3.2.1</version>
   <configuration>
     <scalaOrganization>org.typelevel</scalaOrganization>
-    <scalaVersion>2.12.3-bin-typelevel-4</scalaOrganization>
+    <scalaVersion>2.12.4-bin-typelevel-4</scalaOrganization>
   </configuration>
 </plugin>
 ```

try-typelevel-scala.sh

@@ -3,11 +3,11 @@ COURSIER_URL=https://git.io/vgvpD
 test -e ~/.coursier/coursier || \
   (mkdir -p ~/.coursier && curl -L -s --output ~/.coursier/coursier $COURSIER_URL && chmod +x ~/.coursier/coursier)
 ~/.coursier/coursier launch -q -P \
-  com.lihaoyi:ammonite_2.12.3:1.0.1 \
+  com.lihaoyi:ammonite_2.12.4:1.0.3 \
   -E org.scala-lang:scala-library \
   -E org.scala-lang:scala-compiler \
   -E org.scala-lang:scala-reflect \
-  org.typelevel:scala-compiler:2.12.3-bin-typelevel-4 \
-  org.typelevel:scala-library:2.12.3-bin-typelevel-4 \
-  org.typelevel:scala-reflect:2.12.3-bin-typelevel-4 \
+  org.typelevel:scala-compiler:2.12.4-bin-typelevel-4 \
+  org.typelevel:scala-library:2.12.4-bin-typelevel-4 \
+  org.typelevel:scala-reflect:2.12.4-bin-typelevel-4 \
   -- < /dev/tty