TASK: Rename default branch to main

Author: dlubitz

Documentation/Index.rst

@@ -278,4 +278,4 @@ This can be done by using the following example vcl:
 
 ***Note*** Example_ of full VCL configuration file (Varnish 3) – Use with care!
 
-.. _Example: https://github.com/flowpack/varnish/blob/master/Documentation/example.vcl
+.. _Example: https://github.com/flowpack/varnish/blob/main/Documentation/example.vcl

README.md

@@ -1,6 +1,6 @@
 # Varnish
 
-[![Build Status](https://travis-ci.com/Flowpack/Varnish.svg?branch=master)](https://travis-ci.com/github/Flowpack/varnish)
+[![Build Status](https://travis-ci.com/Flowpack/Varnish.svg?branch=main)](https://travis-ci.com/github/Flowpack/varnish)
 [![Latest Stable Version](https://poser.pugx.org/flowpack/varnish/v/stable)](https://packagist.org/packages/flowpack/varnish)
 [![Total Downloads](https://poser.pugx.org/flowpack/varnish/downloads)](https://packagist.org/packages/flowpack/varnish)
 [![License](https://poser.pugx.org/flowpack/varnish/license)](https://packagist.org/packages/flowpack/varnish)

composer.json

@@ -25,7 +25,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "4.1.x-dev"
+            "dev-main": "4.1.x-dev"
         },
         "applied-flow-migrations": [
             "TYPO3.FLOW3-201201261636",