Change default branch from master to v1.x

Author: Art4

CHANGELOG.md

@@ -5,15 +5,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased](https://github.com/Art4/json-api-client/compare/0.10.2...HEAD)
+## [Unreleased](https://github.com/Art4/json-api-client/compare/0.10.2...v1.x)
 
 ### Added
 
 - Support for PHP 8 added
 
 ### Changed
 
-- Support for PHP 5.6, 7.0, 7.1, 7.2 and 7.3 dropped, PHP ^7.4 is now required
+- Support for PHP 5.6, 7.0, 7.1, 7.2 and 7.3 dropped, PHP 7.4 is now required
 - **BREAKING**: Providing the fields `type` or `id` in a resource not as a string throws a `\Art4\JsonApiClient\Exception\ValidationException`, provide them always as strings instead
 
 ### Removed

README.md

@@ -2,8 +2,8 @@
 
 [![Latest Version](https://img.shields.io/github/release/Art4/json-api-client.svg)](https://github.com/Art4/json-api-client/releases)
 [![Software License](https://img.shields.io/badge/license-GPL3-brightgreen.svg)](LICENSE)
-[![Build Status](https://travis-ci.org/Art4/json-api-client.svg?branch=master)](https://travis-ci.org/Art4/json-api-client)
-[![Coverage Status](https://coveralls.io/repos/Art4/json-api-client/badge.svg?branch=master&service=github)](https://coveralls.io/github/Art4/json-api-client?branch=master)
+[![Build Status](https://travis-ci.org/Art4/json-api-client.svg?branch=v1.x)](https://travis-ci.org/Art4/json-api-client)
+[![Coverage Status](https://coveralls.io/repos/Art4/json-api-client/badge.svg?branch=v1.x&service=github)](https://coveralls.io/github/Art4/json-api-client?branch=v1.x)
 [![Total Downloads](https://img.shields.io/packagist/dt/art4/json-api-client.svg)](https://packagist.org/packages/art4/json-api-client)
 
 JsonApiClient :construction_worker_woman: is a PHP Library to validate and handle the response body from a [JSON API](http://jsonapi.org) Server.