Twitter-oss: Prepare OSS libraries for release 21.4

Problem

We want to release the next versions of our Twitter OSS libraries 21.4.0
 - util
 - scrooge
 - finagle
 - twitter-server
 - finatra

Solution

Prepare libraries for their next releases.

JIRA Issues: CSL-10889

Differential Revision: https://phabricator.twitter.biz/D658986

CHANGELOG.rst

@@ -7,6 +7,9 @@ Note that ``PHAB_ID=#`` and ``RB_ID=#`` correspond to associated messages in com
 Unreleased
 ----------
 
+21.4.0
+------
+
 New Features
 ~~~~~~~~~~~~
 

README.md

@@ -5,7 +5,7 @@
 
 # Finagle
 
-[![Build Status](https://github.com/twitter/finagle/workflows/continuous%20integration/badge.svg?branch=develop)](https://github.com/twitter/finagle/actions?query=workflow%3A%22continuous+integration%22+branch%3Adevelop)
+[![Build Status](https://github.com/twitter/finagle/workflows/continuous%20integration/badge.svg?branch=release)](https://github.com/twitter/finagle/actions?query=workflow%3A%22continuous+integration%22+branch%3Arelease)
 [![Codecov](https://codecov.io/gh/twitter/finagle/branch/develop/graph/badge.svg)](https://codecov.io/gh/twitter/finagle)
 [![Project status](https://img.shields.io/badge/status-active-brightgreen.svg)](#status)
 [![Gitter](https://badges.gitter.im/twitter/finagle.svg)](https://gitter.im/twitter/finagle?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)

build.sbt

@@ -2,7 +2,7 @@ import Tests._
 import scoverage.ScoverageKeys
 
 // All Twitter library releases are date versioned as YY.MM.patch
-val releaseVersion = "21.4.0-SNAPSHOT"
+val releaseVersion = "21.4.0"
 
 val libthriftVersion = "0.10.0"
 

doc/src/sphinx/code/client-server-anatomy/build.sbt

@@ -5,5 +5,5 @@ version := "1.0"
 scalaVersion := "2.12.12"
 
 libraryDependencies ++= Seq(
-  "com.twitter" %% "finagle-core" % "21.3.0"
+  "com.twitter" %% "finagle-core" % "21.4.0"
 )

doc/src/sphinx/code/protocols/build.sbt

@@ -5,5 +5,5 @@ version := "1.0"
 scalaVersion := "2.12.13"
 
 libraryDependencies ++= Seq(
-  "com.twitter" %% "finagle-mysql" % "21.3.0"
+  "com.twitter" %% "finagle-mysql" % "21.4.0"
 )

doc/src/sphinx/code/quickstart/build.sbt

@@ -7,6 +7,6 @@ lazy val root = (project in file(".")).
     )),
     name := "quickstart",
     libraryDependencies ++= Seq(
-      "com.twitter" %% "finagle-http" % "21.3.0"
+      "com.twitter" %% "finagle-http" % "21.4.0"
     )
   )

project/plugins.sbt

@@ -1,7 +1,7 @@
 resolvers += Classpaths.sbtPluginReleases
 resolvers += Resolver.sonatypeRepo("snapshots")
 
-val releaseVersion = "21.4.0-SNAPSHOT"
+val releaseVersion = "21.4.0"
 
 addSbtPlugin("com.twitter" % "scrooge-sbt-plugin" % releaseVersion)