Update main branch references

This is due the recent renaming of the branch "master" to "main".

Author: philss

.github/workflows/ci.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   test:

CHANGELOG.md

@@ -275,7 +275,7 @@ this function can create a tree with more or less nodes. - thanks [@ericlathrop]
 - Added support for `nth-of-type`, `first-of-type`, `last-of-type` and `last-child` pseudo-classes - thanks [@saleem1337](https://github.com/saleem1337).
 - Added support for `nth-child` pseudo-class functional notation - thanks [@nirev](https://github.com/nirev).
 - Added functional notation support for `nth-of-type` pseudo-class.
-- Added a [Contributing guide](https://github.com/philss/floki/blob/master/CONTRIBUTING.md).
+- Added a [Contributing guide](https://github.com/philss/floki/blob/main/CONTRIBUTING.md).
 
 ### Fixed
 
@@ -286,7 +286,7 @@ this function can create a tree with more or less nodes. - thanks [@ericlathrop]
 
 ### Added
 
-- Added a [Code of Conduct](https://github.com/philss/floki/blob/master/CODE_OF_CONDUCT.md).
+- Added a [Code of Conduct](https://github.com/philss/floki/blob/main/CODE_OF_CONDUCT.md).
 
 ### Fixed
 

CONTRIBUTING.md

@@ -3,7 +3,7 @@
 We want to encourage you to contribute to Floki with documentation, code and ideas.
 To do so, you can read the existing docs and take a look at our source code through [closed pull requests](https://github.com/philss/floki/pulls?q=is%3Apr+is%3Aclosed).
 
-Before starting, please read our [Code of Conduct](https://github.com/philss/floki/blob/master/CODE_OF_CONDUCT.md) and our [License](https://github.com/philss/floki/blob/master/LICENSE) files.
+Before starting, please read our [Code of Conduct](https://github.com/philss/floki/blob/main/CODE_OF_CONDUCT.md) and our [License](https://github.com/philss/floki/blob/main/LICENSE) files.
 
 ### Docs
 

README.md

@@ -1,9 +1,9 @@
-[![Actions Status](https://github.com/philss/floki/workflows/CI/badge.svg?branch=master)](https://github.com/philss/floki/actions)
+[![Actions Status](https://github.com/philss/floki/workflows/CI/badge.svg?branch=main)](https://github.com/philss/floki/actions)
 [![Floki version](https://img.shields.io/hexpm/v/floki.svg)](https://hex.pm/packages/floki)
 [![Hex Docs](https://img.shields.io/badge/hex-docs-lightgreen.svg)](https://hexdocs.pm/floki/)
 [![Hex.pm](https://img.shields.io/hexpm/dt/floki.svg)](https://hex.pm/packages/floki)
-[![License](https://img.shields.io/hexpm/l/floki.svg)](https://github.com/philss/floki/blob/master/LICENSE)
-[![Last Updated](https://img.shields.io/github/last-commit/philss/floki.svg)](https://github.com/philss/floki/commits/master)
+[![License](https://img.shields.io/hexpm/l/floki.svg)](https://github.com/philss/floki/blob/main/LICENSE)
+[![Last Updated](https://img.shields.io/github/last-commit/philss/floki.svg)](https://github.com/philss/floki/commits/main)
 
 <img src="assets/images/floki-logo-with-type.svg" width="500" alt="Floki logo">
 
@@ -270,4 +270,4 @@ There are also some selectors based on non-standard specifications. They are:
 
 Copyright (c) 2014 Philip Sampaio Silva
 
-Floki is under MIT license. Check the [LICENSE](https://github.com/philss/floki/blob/master/LICENSE) file for more details.
+Floki is under MIT license. Check the [LICENSE](https://github.com/philss/floki/blob/main/LICENSE) file for more details.