Tweak Maven Central publishing & update badges (#23)

* Push to Maven Central on release

* Update badges

* Update main branch name

Author: stringbean

.github/workflows/ci.yml

@@ -1,10 +1,8 @@
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
-    branches:
-      - master
 
 jobs:
   test:

README.md

@@ -1,9 +1,10 @@
 # sbt-dependency-lock 
-[![Build Status](https://travis-ci.com/stringbean/sbt-dependency-lock.svg?branch=master)](https://travis-ci.com/stringbean/sbt-dependency-lock)
+
+[![Build Status](https://img.shields.io/github/workflow/status/stringbean/sbt-dependency-lock/ci)](https://github.com/stringbean/sbt-dependency-lock/actions/workflows/ci.yml)
 [![Codacy grade](https://img.shields.io/codacy/grade/d45ca406c90c45c88a3a317563bc3302?label=codacy)](https://codacy.com/app/stringbean/sbt-dependency-lock)
 [![Known Vulnerabilities](https://snyk.io/test/github/stringbean/sbt-dependency-lock/badge.svg?targetFile=build.sbt)](https://snyk.io/test/github/stringbean/sbt-dependency-lock?targetFile=build.sbt)
-![Bintray](https://img.shields.io/bintray/v/stringbean/sbt-plugins/sbt-dependency-lock?label=sbt%201.x) 
-[![Join the chat at https://gitter.im/sbt-dependency-lock/community](https://badges.gitter.im/sbt-dependency-lock/community.svg)](https://gitter.im/sbt-dependency-lock/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+![Maven Central](https://img.shields.io/maven-central/v/software.purpledragon/sbt-dependency-lock_2.12_1.0?label=sbt%201.x) 
+[![GitHub Discussions](https://img.shields.io/github/discussions/stringbean/sbt-dependency-lock)](https://github.com/stringbean/sbt-dependency-lock/discussions)
 
 An sbt plugin to create a dependency lockfile similar to `package-lock.json` for npm or `Gemfile.lock` for RubyGems.
 

build.sbt

@@ -58,6 +58,7 @@ releaseProcess := Seq[ReleaseStep](
   commitReleaseVersion,
   tagRelease,
   publishArtifacts,
+  releaseStepTask(sonatypeBundleRelease),
   releaseStepTask(ghpagesPushSite),
   setNextVersion,
   commitNextVersion,