Rename master branch to main

Author: akoeplinger

.github/workflows/mac.yml

@@ -3,10 +3,10 @@ name: macOS
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 
 jobs:

.github/workflows/ubuntu.yml

@@ -3,10 +3,10 @@ name: Ubuntu
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 
 jobs:

.github/workflows/windows.yml

@@ -3,10 +3,10 @@ name: Windows
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 
 jobs:

README.md

@@ -2,10 +2,6 @@
 
 [![Join the chat at https://gitter.im/mono/taglib-sharp](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/mono/taglib-sharp?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-[![Linux Build Status](https://travis-ci.org/mono/taglib-sharp.svg?branch=master)](https://travis-ci.org/mono/taglib-sharp)
-[![Windows Build status](https://ci.appveyor.com/api/projects/status/v7vwgphs239i14ya?svg=true)](https://ci.appveyor.com/project/decriptor/taglib-sharp)
-
-
 (aka *Taglib-sharp*) is a .NET platform-independent library (tested on Windows/Linux) for reading and writing
 metadata in media files, including video, audio, and photo formats. 
 This is a convenient one-stop-shop to present or tag all your media collection, regardless of which format/container