Update primary branch to main.

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing to Goomph
 
-Pull requests are welcome, preferably against `master`.
+Pull requests are welcome, preferably against `main`.
 
 ## Build instructions
 
@@ -42,7 +42,7 @@ To test your changes, run `gradlew publishToMavenLocal` on your Goomph project.
 
 ## License
 
-By contributing your code, you agree to license your contribution under the terms of the APLv2: https://github.com/diffplug/durian/blob/master/LICENSE
+By contributing your code, you agree to license your contribution under the terms of the APLv2: https://github.com/diffplug/durian/blob/main/LICENSE
 
 All files are released with the Apache 2.0 license as such:
 

HOW_TO_AUTOMATE_IDE.md

@@ -6,10 +6,10 @@ output = prefixDelimiterReplace(input, 'https://javadoc.io/static/com.diffplug.g
 
 So you want to automate your IDE configuration.  The first thing to do is look at a few examples.
 
-- [Gradle and Eclipse RCP talk](https://github.com/diffplug/gradle_and_eclipse_rcp/blob/master/ide/build.gradle) (multi-project Eclipse RCP project)
-- [lsp4j](https://github.com/eclipse/lsp4j/blob/master/ide/build.gradle) (xtend IDE example)
-- [swt-chromium](https://github.com/diffplug/swt-chromium/blob/master/ide/build.gradle) (C++ example)
-- [Spotless](https://github.com/diffplug/spotless/blob/master/ide/build.gradle) (single-project Gradle plugin)
+- [Gradle and Eclipse RCP talk](https://github.com/diffplug/gradle_and_eclipse_rcp/blob/main/ide/build.gradle) (multi-project Eclipse RCP project)
+- [lsp4j](https://github.com/eclipse/lsp4j/blob/main/ide/build.gradle) (xtend IDE example)
+- [swt-chromium](https://github.com/diffplug/swt-chromium/blob/main/ide/build.gradle) (C++ example)
+- [Spotless](https://github.com/diffplug/spotless/blob/main/ide/build.gradle) (single-project Gradle plugin)
 - (your example here)
 
 The next thing is to look at the [javadoc](https://javadoc.io/static/com.diffplug.gradle/goomph/3.22.0/com/diffplug/gradle/oomph/OomphIdePlugin.html) for `OomphIdePlugin`, which inclues a pretty in-depth look at how it works.
@@ -76,15 +76,15 @@ You can also use Eclipse's internal APIs to programatically set properties.  Thi
 
 ## How do I add a DSL for a plugin?
 
-If you have an Eclipse plugin that you'd like to add to to Goomph, we'd love to have it!  Take a look at [ConventionThirdParty](https://github.com/diffplug/goomph/blob/master/src/main/java/com/diffplug/gradle/oomph/thirdparty/ConventionThirdParty.java), and add a block for your plugin there.  If you look at all subclasses of `OomphConvention`, you can see how you can make a configuration DSL for your users, if you'd like.  But even just a simple "add the repo, add the feature" is helpful.
+If you have an Eclipse plugin that you'd like to add to to Goomph, we'd love to have it!  Take a look at [ConventionThirdParty](https://github.com/diffplug/goomph/blob/main/src/main/java/com/diffplug/gradle/oomph/thirdparty/ConventionThirdParty.java), and add a block for your plugin there.  If you look at all subclasses of `OomphConvention`, you can see how you can make a configuration DSL for your users, if you'd like.  But even just a simple "add the repo, add the feature" is helpful.
 
 ##  Contribute back!
 
 If you find out how to set a useful setting, please consider contributing it back!  Key places where it might make sense to contribute:
 
-- [ConventionStyle](https://github.com/diffplug/goomph/blob/master/src/main/java/com/diffplug/gradle/oomph/ConventionStyle.java) is the `style{}` block in `oomphIde`.
-- [ConventionJdt](https://github.com/diffplug/goomph/blob/master/src/main/java/com/diffplug/gradle/oomph/ConventionJdt.java) is the `jdt{}` block in `oomphIde`.
-- [ConventionPde](https://github.com/diffplug/goomph/blob/master/src/main/java/com/diffplug/gradle/oomph/ConventionPde.java) is the `pde{}` block in `oomphIde`.
-- or a new subclass of [OomphConvention](https://github.com/diffplug/goomph/blob/master/src/main/java/com/diffplug/gradle/oomph/OomphConvention.java) to create a new way of grouping settings.
+- [ConventionStyle](https://github.com/diffplug/goomph/blob/main/src/main/java/com/diffplug/gradle/oomph/ConventionStyle.java) is the `style{}` block in `oomphIde`.
+- [ConventionJdt](https://github.com/diffplug/goomph/blob/main/src/main/java/com/diffplug/gradle/oomph/ConventionJdt.java) is the `jdt{}` block in `oomphIde`.
+- [ConventionPde](https://github.com/diffplug/goomph/blob/main/src/main/java/com/diffplug/gradle/oomph/ConventionPde.java) is the `pde{}` block in `oomphIde`.
+- or a new subclass of [OomphConvention](https://github.com/diffplug/goomph/blob/main/src/main/java/com/diffplug/gradle/oomph/OomphConvention.java) to create a new way of grouping settings.
 
 <!---freshmark /javadoc -->

PULL_REQUEST_TEMPLATE.md

@@ -2,7 +2,7 @@ Please make sure that your [PR allows edits from maintainers](https://help.githu
 
 ![Allow edits from maintainers](https://help.github.com/assets/images/help/pull_requests/allow-maintainers-to-make-edits-sidebar-checkbox.png)
 
-After creating the PR, please add a commit that adds a bullet-point under the `-SNAPSHOT` section of [CHANGES.md](https://github.com/diffplug/goomph/blob/master/CHANGES.md) that includes:
+After creating the PR, please add a commit that adds a bullet-point under the `-SNAPSHOT` section of [CHANGES.md](https://github.com/diffplug/goomph/blob/main/CHANGES.md) that includes:
 
 - [ ] a summary of the change
 - [ ] a link to the newly created PR

README.md

@@ -10,7 +10,7 @@ output = [
   link(shield('Changelog', 'changelog', '{{versionLast}}', 'brightgreen'), 'CHANGES.md'),
   link(shield('Javadoc', 'javadoc', 'yes', 'brightgreen'), 'https://javadoc.io/doc/com.diffplug.gradle/goomph/{{versionLast}}/index.html'),
   link(shield('Live chat', 'gitter', 'live chat', 'brightgreen'), 'https://gitter.im/diffplug/goomph'),
-  link(image('Travis CI', 'https://travis-ci.org/diffplug/goomph.svg?branch=master'), 'https://travis-ci.org/diffplug/goomph')
+  link(image('Travis CI', 'https://travis-ci.org/diffplug/goomph.svg?branch=main'), 'https://travis-ci.org/diffplug/goomph')
   ].join('\n');
 -->
 [![Gradle plugin](https://img.shields.io/badge/plugins.gradle.org-yes-blue.svg)](https://plugins.gradle.org/search?term=goomph)
@@ -20,7 +20,7 @@ output = [
 [![Changelog](https://img.shields.io/badge/changelog-3.22.0-brightgreen.svg)](CHANGES.md)
 [![Javadoc](https://img.shields.io/badge/javadoc-yes-brightgreen.svg)](https://javadoc.io/doc/com.diffplug.gradle/goomph/3.22.0/index.html)
 [![Live chat](https://img.shields.io/badge/gitter-live_chat-brightgreen.svg)](https://gitter.im/diffplug/goomph)
-[![Travis CI](https://travis-ci.org/diffplug/goomph.svg?branch=master)](https://travis-ci.org/diffplug/goomph)
+[![Travis CI](https://travis-ci.org/diffplug/goomph.svg?branch=main)](https://travis-ci.org/diffplug/goomph)
 <!---freshmark /shields -->
 
 <!---freshmark javadoc