Prepare v0.0.2 release of devtools_server (#550)

Author: DanTup

packages/devtools_server/CHANGELOG.md

@@ -0,0 +1,5 @@
+## 0.0.2
+* Reduce the minimum Dart SDK requirements for activating DevTools to cover Flutter v1.2.1 (Dart v2.1)
+
+## 0.0.1
+- initial (pre-release) release

packages/devtools_server/pubspec.yaml

@@ -1,7 +1,7 @@
 name: devtools_server
 description: A server that supports Dart DevTools.
 
-version: 0.0.1
+version: 0.0.2
 
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/flutter/devtools

tool/README.md

@@ -1,6 +1,10 @@
 ## How to release the next version of DevTools
 
-Create a branch for your release. Below we're creating release 0.0.15, with all the PRs. 
+**Note:** If you need to publish a new version of devtools_server, you will need
+to do that prior to performing these steps, and update the devtools pubspec.yaml
+to reference the new version of devtools_server.
+
+Create a branch for your release. Below we're creating release 0.0.15, with all the PRs.
 
 ## Update master branch and create a local release branch
 ```shell