chore: update GitHub branch references to use HEAD (#993)

CHANGELOG.md

@@ -190,7 +190,7 @@ Thanks to the [strong support and feedback of the SendGrid PHP community](https:
 
 In particular, I'd like to make special mention of [@caseyw](https://github.com/caseyw), [@vitya1](https://github.com/vitya1), [@Braunson](https://github.com/Braunson), [@cbschuld](https://github.com/cbschuld), [@paoga87](https://github.com/paoga87), [@Taluu](https://github.com/Taluu), [@mazanax](https://github.com/mazanax), [@ninsuo](https://github.com/ninsuo), [@ianh2](https://github.com/ianh2), [@WadeShuler](https://github.com/WadeShuler), [@jaimehing](https://github.com/jaimehing), [@KnightAR](https://github.com/KnightAR), [@alextech](https://github.com/alextech) (my apologies if I've missed you)
 
-Since this is a major departure from v6.X, we advise you to refactor your code according to the documentation found in the [README](https://github.com/sendgrid/sendgrid-php/blob/master/README.md) and [USE_CASES](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md) files. We hope you find the new interface much easier to work with. Please open an [issue](https://github.com/sendgrid/sendgrid-php/issues) or PR if you run into any trouble or have any feedback. 
+Since this is a major departure from v6.X, we advise you to refactor your code according to the documentation found in the [README](README.md) and [USE_CASES](USE_CASES.md) files. We hope you find the new interface much easier to work with. Please open an [issue](https://github.com/sendgrid/sendgrid-php/issues) or PR if you run into any trouble or have any feedback. 
 
 If you wish to continue using previous versions of this SDK, no problem. However, we will not be updating versions less than v7 except for critical bugs and/or security issues.
 
@@ -408,11 +408,11 @@ Added CodeCov support, thanks to [Owen Voke](https://github.com/pxgamer) for the
 ## [5.0.8] - 2016-08-24 ##
 ### Added
 - Table of Contents in the README
-- Added a [USE_CASES.md](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md) section, with the first use case example for transactional templates
+- Added a [USE_CASES.md](USE_CASES.md) section, with the first use case example for transactional templates
 
 ## [5.0.7] - 2016-07-25 ##
 ### Added
-- [Troubleshooting](https://github.com/sendgrid/sendgrid-php/blob/master/TROUBLESHOOTING.md) section
+- [Troubleshooting](TROUBLESHOOTING.md) section
 
 ## [5.0.6] - 2016-07-20 ##
 ### Added

CONTRIBUTING.md

@@ -83,7 +83,7 @@ source ./sendgrid.env
 
 ##### Execute: #####
 
-See the [examples folder](https://github.com/sendgrid/sendgrid-php/tree/master/examples) or [README](https://github.com/sendgrid/sendgrid-php/blob/master/README.md) to get started quickly.
+See the [examples folder](examples) or [README](README.md) to get started quickly.
 
 We prefer the use of the Composer autoloader by loading `vendor/autoload.php`.
 
@@ -113,7 +113,7 @@ The interface to the Twilio SendGrid API. The subfolders are helpers.
 
 ## Testing
 
-All PRs require passing tests before the PR will be reviewed. All test files are in the [`/test/unit`](https://github.com/sendgrid/sendgrid-php/tree/master/test/unit) directory. For the purposes of contributing to this repo, please update or add relevant test files [here](https://github.com/sendgrid/sendgrid-php/tree/master/test) with tests as you modify the code.
+All PRs require passing tests before the PR will be reviewed. All test files are in the [`/test/unit`](test/unit) directory. For the purposes of contributing to this repo, please update or add relevant test files [here](test) with tests as you modify the code.
 
 The integration tests require a Twilio SendGrid mock API in order to execute. We've simplified setting this up using Docker to run the tests. You will just need [Docker Desktop](https://docs.docker.com/get-docker/) and `make`.
 

README.md

@@ -1,6 +1,6 @@
-![SendGrid Logo](https://github.com/sendgrid/sendgrid-python/raw/master/twilio_sendgrid_logo.png)
+![SendGrid Logo](twilio_sendgrid_logo.png)
 
-[![BuildStatus](https://travis-ci.org/sendgrid/sendgrid-php.svg?branch=master)](https://travis-ci.org/sendgrid/sendgrid-php)
+[![BuildStatus](https://travis-ci.org/sendgrid/sendgrid-php.svg?branch=main)](https://travis-ci.org/sendgrid/sendgrid-php)
 [![Packagist](https://img.shields.io/packagist/v/sendgrid/sendgrid.svg)](https://packagist.org/packages/sendgrid/sendgrid)
 [![Downloads](https://img.shields.io/packagist/dt/sendgrid/sendgrid.svg?maxAge=3600)](https://packagist.org/packages/sendgrid/sendgrid)
 [![Email Notifications Badge](https://dx.sendgrid.com/badge/php)](https://dx.sendgrid.com/newsletter/php)
@@ -14,13 +14,13 @@
 **The default branch name for this repository has been changed to `main` as of 07/27/2020.**
 
 - Subscribe to email [notifications](https://dx.sendgrid.com/newsletter/php) for releases and breaking changes.
-- Send SMS messages with [Twilio](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md#sms).
+- Send SMS messages with [Twilio](USE_CASES.md#sms).
 
 **This library allows you to quickly and easily use the Twilio SendGrid Web API v3 via PHP.**
 
 Version 7.X.X of this library provides full support for all Twilio SendGrid [Web API v3](https://sendgrid.com/docs/API_Reference/Web_API_v3/index.html) endpoints, including the new [v3 /mail/send](https://sendgrid.com/blog/introducing-v3mailsend-sendgrids-new-mail-endpoint).
 
-We want this library to be community driven and Twilio SendGrid led. Your help is needed to realize this goal. To help make sure we are building the right things in the right order, we ask that you create [issues](https://github.com/sendgrid/sendgrid-php/issues) and [pull requests](https://github.com/sendgrid/sendgrid-php/blob/master/CONTRIBUTING.md) or simply upvote or comment on existing issues or pull requests.
+We want this library to be community driven and Twilio SendGrid led. Your help is needed to realize this goal. To help make sure we are building the right things in the right order, we ask that you create [issues](https://github.com/sendgrid/sendgrid-php/issues) and [pull requests](CONTRIBUTING.md) or simply upvote or comment on existing issues or pull requests.
 
 Please browse the rest of this README for further details.
 
@@ -125,7 +125,7 @@ try {
 }
 ```
 
-The `SendGrid\Mail` constructor creates a [personalization object](https://sendgrid.com/docs/Classroom/Send/v3_Mail_Send/personalizations.html) for you. [Here](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md#kitchen-sink) is an example of how to add to it.
+The `SendGrid\Mail` constructor creates a [personalization object](https://sendgrid.com/docs/Classroom/Send/v3_Mail_Send/personalizations.html) for you. [Here](USE_CASES.md#kitchen-sink) is an example of how to add to it.
 
 ## General v3 Web API Usage (With Fluent Interface)
 
@@ -162,22 +162,22 @@ try {
 <a name="use-cases"></a>
 # Use Cases
 
-[Examples of common API use cases](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md), such as how to send an email with a transactional template.
+[Examples of common API use cases](USE_CASES.md), such as how to send an email with a transactional template.
 
 <a name="usage"></a>
 # Usage
 
 - [Twilio SendGrid Docs](https://sendgrid.com/docs/API_Reference/index.html)
 - [Generic Library Usage
-    Documentation](https://github.com/sendgrid/sendgrid-php/tree/master/USAGE.md)
-- [Example Code](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md)
+    Documentation](USAGE.md)
+- [Example Code](USE_CASES.md)
 
 <a name="announcements"></a>
 # Announcements
 
 v7 has been released! Please see the [release notes](https://github.com/sendgrid/sendgrid-php/releases/tag/v7.0.0) for details.
 
-All updates to this library are documented in our [CHANGELOG](https://github.com/sendgrid/sendgrid-php/blob/master/CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-php/releases). You may also subscribe to email [release notifications](https://dx.sendgrid.com/newsletter/php) for releases and breaking changes.
+All updates to this library are documented in our [CHANGELOG](CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-php/releases). You may also subscribe to email [release notifications](https://dx.sendgrid.com/newsletter/php) for releases and breaking changes.
 
 <a name="roadmap"></a>
 # Roadmap
@@ -187,19 +187,19 @@ If you are interested in the future direction of this project, please take a loo
 <a name="contribute"></a>
 # How to Contribute
 
-We encourage contribution to our libraries (you might even score some nifty swag), please see our [CONTRIBUTING](https://github.com/sendgrid/sendgrid-php/blob/master/CONTRIBUTING.md) guide for details.
+We encourage contribution to our libraries (you might even score some nifty swag), please see our [CONTRIBUTING](CONTRIBUTING.md) guide for details.
 
 Quick links:
 
-- [Feature Request](https://github.com/sendgrid/sendgrid-php/blob/master/CONTRIBUTING.md#feature_request)
-- [Bug Reports](https://github.com/sendgrid/sendgrid-php/blob/master/CONTRIBUTING.md#submit_a_bug_report)
-- [Improvements to the Codebase](https://github.com/sendgrid/sendgrid-php/blob/master/CONTRIBUTING.md#improvements_to_the_codebase)
-- [Review Pull Requests](https://github.com/sendgrid/sendgrid-php/blob/master/CONTRIBUTING.md#code-reviews)
+- [Feature Request](CONTRIBUTING.md#feature_request)
+- [Bug Reports](CONTRIBUTING.md#submit_a_bug_report)
+- [Improvements to the Codebase](CONTRIBUTING.md#improvements_to_the_codebase)
+- [Review Pull Requests](CONTRIBUTING.md#code-reviews)
 
 <a name="troubleshooting"></a>
 # Troubleshooting
 
-Please see our [troubleshooting guide](https://github.com/sendgrid/sendgrid-php/blob/master/TROUBLESHOOTING.md) for common library issues.
+Please see our [troubleshooting guide](TROUBLESHOOTING.md) for common library issues.
 
 <a name="about"></a>
 # About

TROUBLESHOOTING.md

@@ -72,7 +72,7 @@ You may find complete documentation [here](https://sendgrid.com/docs/API_Referen
 <a name="versions"></a>
 ## Versions
 
-We follow the MAJOR.MINOR.PATCH versioning scheme as described by [SemVer.org](http://semver.org). Therefore, we recommend that you always pin (or vendor) the particular version you are working with to your code and never auto-update to the latest version. Especially when there is a MAJOR point release, since that is guaranteed to be a breaking change. Changes are documented in the [CHANGELOG](https://github.com/sendgrid/sendgrid-php/blob/master/CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-php/releases) section.
+We follow the MAJOR.MINOR.PATCH versioning scheme as described by [SemVer.org](http://semver.org). Therefore, we recommend that you always pin (or vendor) the particular version you are working with to your code and never auto-update to the latest version. Especially when there is a MAJOR point release, since that is guaranteed to be a breaking change. Changes are documented in the [CHANGELOG](CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-php/releases) section.
 
 <a name="environment"></a>
 ## Environment Variables and Your Twilio SendGrid API Key
@@ -129,4 +129,4 @@ echo json_encode($email, JSON_PRETTY_PRINT);
 <a name="GAE-instructions"></a>
 ## Google App Engine installation
 
-Please refer to [`USE_CASES.md`](https://github.com/sendgrid/sendgrid-php/blob/master/USE_CASES.md#GAE-instructions) for additional instructions.
+Please refer to [`USE_CASES.md`](USE_CASES.md#GAE-instructions) for additional instructions.

USAGE.md

@@ -2179,7 +2179,7 @@ For more detailed information about how to use the v3 Mail Send endpoint, please
 
 ### POST /mail/send
 
-This endpoint has a helper, check it out [here](https://github.com/sendgrid/sendgrid-php/blob/master/lib/helpers/mail/README.md).
+This endpoint has a helper, check it out [here](lib/helpers/mail/README.md).
 
 ```php
 $request_body = json_decode('{

USE_CASES.md

@@ -1401,14 +1401,14 @@ For more information, please visit the [Twilio SMS PHP documentation](https://ww
 <a name="domain-authentication"></a>
 # How to Set up a Domain Authentication
 
-You can find documentation for how to setup a domain authentication via the UI [here](https://sendgrid.com/docs/ui/account-and-settings/how-to-set-up-domain-authentication/) and via API [here](https://github.com/sendgrid/sendgrid-php/blob/master/USAGE.md#sender-authentication).
+You can find documentation for how to setup a domain authentication via the UI [here](https://sendgrid.com/docs/ui/account-and-settings/how-to-set-up-domain-authentication/) and via API [here](USAGE.md#sender-authentication).
 
 Find more information about all of Twilio SendGrid's authentication related documentation [here](https://sendgrid.com/docs/ui/account-and-settings/).
 
 <a name="email-stats"></a>
 # How to View Email Statistics
 
-You can find documentation for how to view your email statistics via the UI [here](https://app.example.com/statistics) and via API [here](https://github.com/sendgrid/sendgrid-php/blob/master/USAGE.md#stats).
+You can find documentation for how to view your email statistics via the UI [here](https://app.example.com/statistics) and via API [here](USAGE.md#stats).
 
 Alternatively, we can post events to a URL of your choice via our [Event Webhook](https://example.com/docs/API_Reference/Webhooks/event.html) about events that occur as Twilio SendGrid processes your email.
 

examples/mail/mail.php

@@ -38,7 +38,7 @@
 ////////////////////////////////////////////////////
 // v3 Mail Send #
 // POST /mail/send #
-// This endpoint has a helper, check it out [here](https://github.com/sendgrid/sendgrid-php/blob/master/lib/mail/README.md).
+// This endpoint has a helper, check it out [here](https://github.com/sendgrid/sendgrid-php/blob/HEAD/lib/mail/README.md).
 
 $request_body = json_decode('{
   "asm": {

lib/contacts/README.md

@@ -4,13 +4,13 @@
 
 ## Quick Start
 
-Run the [example](https://github.com/sendgrid/sendgrid-php/blob/master/examples/helpers/contacts/recipients.php) (make sure you have set your environment variable to include your SENDGRID_API_KEY).
+Run the [example](../../examples/helpers/contacts/recipients.php) (make sure you have set your environment variable to include your SENDGRID_API_KEY).
 
 ```bash
 php examples/helpers/contacts/recipients.php
 ```
 
 ## Usage
 
-- See this complete working [example](https://github.com/sendgrid/sendgrid-php/blob/master/examples/helpers/contacts/recipients.php).
+- See this complete working [example](../../examples/helpers/contacts/recipients.php).
 - [Documentation](https://sendgrid.com/docs/API_Reference/api_v3.html#contacts-api-recipients)

lib/mail/README.md

@@ -2,13 +2,13 @@
 
 # Quick Start
 
-Run the [example](https://github.com/sendgrid/sendgrid-php/blob/master/examples/helpers/mail/example.php) (make sure you have set your environment variable to include your SENDGRID_API_KEY).
+Run the [example](../../examples/helpers/mail/example.php) (make sure you have set your environment variable to include your SENDGRID_API_KEY).
 
 ```bash
 php examples/helpers/mail/example.php
 ```
 
 ## Usage
 
-- See the [example](https://github.com/sendgrid/sendgrid-php/blob/master/examples/helpers/mail/example.php) for a complete working example.
+- See the [example](../../examples/helpers/mail/example.php) for a complete working example.
 - [Documentation](https://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/index.html)