Rename the 'master' branch to 'main'.

Author: sjrd

.github/workflows/ci.yml

@@ -2,10 +2,10 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 jobs:
   build:
     runs-on: ubuntu-latest

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing guidelines
 
-See the [contributing guidelines of Scala.js core](https://github.com/scala-js/scala-js/blob/master/CONTRIBUTING.md).
+See the [contributing guidelines of Scala.js core](https://github.com/scala-js/scala-js/blob/main/CONTRIBUTING.md).
 The same guidelines apply to this repository.
 
 ## Very important notice

build.sbt

@@ -16,7 +16,7 @@ val commonSettings: Seq[Setting[_]] = Seq(
 
   homepage := Some(url("http://scala-js.org/")),
   licenses += ("BSD New",
-      url("https://github.com/scala-js/scala-js-java-logging/blob/master/LICENSE")),
+      url("https://github.com/scala-js/scala-js-java-logging/blob/main/LICENSE")),
   scmInfo := Some(ScmInfo(
       url("https://github.com/scala-js/scala-js-java-logging"),
       "scm:git:git@github.com:scala-js/scala-js-java-logging.git",