chore: update GitHub branch references to use HEAD (#101)

Author: thinkingserious

CONTRIBUTING.md

@@ -68,7 +68,7 @@ Open `csharp-http-client/CSharpHTTPClient/CSharpHTTPClient.sln`
 
 ##### Execute: #####
 
-SSee the [Example project](https://github.com/sendgrid/csharp-http-client/tree/master/Example) to get started quickly.
+SSee the [Example project](Example) to get started quickly.
 
 <a name="understanding-the-codebase"></a>
 ## Understanding the Code Base
@@ -79,20 +79,20 @@ Working examples that demonstrate usage.
 
 **/CSharpHTTPClient/Client.cs**
 
-An HTTP client with a fluent interface using method chaining and reflection. By returning a new object on [TryGetMember](https://github.com/sendgrid/csharp-http-client/blob/master/CSharpHTTPClient/Client.cs#L191) and [_()](https://github.com/sendgrid/csharp-http-client/blob/master/CSharpHTTPClient/Client.cs#L180), we can dynamically build the URL using method chaining and [TryGetMember](https://github.com/sendgrid/csharp-http-client/blob/master/CSharpHTTPClient/Client.cs#L191) allows us to dynamically receive the method calls to achieve reflection.
+An HTTP client with a fluent interface using method chaining and reflection. By returning a new object on [TryGetMember](CSharpHTTPClient/Client.cs#L191) and [_()](CSharpHTTPClient/Client.cs#L180), we can dynamically build the URL using method chaining and [TryGetMember](CSharpHTTPClient/Client.cs#L191) allows us to dynamically receive the method calls to achieve reflection.
 
 This allows for the following mapping from a URL to a method chain:
 
-`/api_client/{api_key_id}/version` maps to `client.api_client._(api_key_id).version.<method>()` where <method> is a supported [Method](https://github.com/sendgrid/csharp-http-client/blob/master/CSharpHTTPClient/Client.cs#L71).
+`/api_client/{api_key_id}/version` maps to `client.api_client._(api_key_id).version.<method>()` where <method> is a supported [Method](CSharpHTTPClient/Client.cs#L71).
 
 <a name="testing"></a>
 ## Testing
 
 All PRs require passing tests before the PR will be reviewed.
 
-All test files are in the [`UnitTest`](https://github.com/sendgrid/csharp-http-client/tree/master/UnitTest) directory.
+All test files are in the [`UnitTest`](UnitTest) directory.
 
-For the purposes of contributing to this repo, please update the [`UnitTest.cs`](https://github.com/sendgrid/csharp-http-client/blob/master/UnitTest/UnitTest.cs) file with unit tests as you modify the code.
+For the purposes of contributing to this repo, please update the [`UnitTest.cs`](UnitTest/UnitTest.cs) file with unit tests as you modify the code.
 
 From the Visual Studio menu: `Tests->Run->All Tests`
 
@@ -153,7 +153,7 @@ Generally, we follow the style guidelines as suggested by the official language.
    ```
 
 7. [Open a Pull Request](https://help.github.com/articles/using-pull-requests/)
-    with a clear title and description against the `master` branch. All tests must be passing before we will review the PR.
+    with a clear title and description against the `main` branch. All tests must be passing before we will review the PR.
 
 ## Code Reviews<a name="code-reviews"></a>
 If you can, please look at open PRs and review them. Give feedback and help us merge these PRs much faster! If you don't know how, Github has some <a href="https://help.github.com/articles/about-pull-request-reviews/">great information on how to review a Pull Request.</a>

FIRST_TIMERS.md

@@ -39,7 +39,7 @@ git checkout -b <topic-branch-name>
  6. __Locally merge (or rebase)__ the upstream development branch into your topic branch:
 ```
 
-    git pull [--rebase] upstream master
+    git pull [--rebase] upstream main
 
 ```
 7. __Push__ your topic branch up to your fork:
@@ -49,7 +49,7 @@ git push origin <topic-branch-name>
 
 ```
 8. __[Open a Pull Request](https://help.github.com/articles/creating-a-pull-request/#changing-the-branch-range-and-destination-repository/)__
- with a clear title and description against the `master` branch. All tests must be passing before we will review the PR.
+ with a clear title and description against the `main` branch. All tests must be passing before we will review the PR.
 ### Important notice
 Before creating a pull request, make sure that you respect the repository's constraints regarding contributions. You can find them in the [CONTRIBUTING.md](./CONTRIBUTING.md) file.
 ## Repositories with Open, Easy, Help Wanted, Issue Filters

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)
 
-[![Travis Badge](https://travis-ci.org/sendgrid/csharp-http-client.svg?branch=master)](https://travis-ci.org/sendgrid/csharp-http-client)
+[![Travis Badge](https://travis-ci.org/sendgrid/csharp-http-client.svg?branch=main)](https://travis-ci.org/sendgrid/csharp-http-client)
 [![NuGet](https://img.shields.io/nuget/v/SendGrid.CSharp.Http.Client.svg)](https://www.nuget.org/packages/SendGrid.CSharp.HTTP.Client)
 [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE.md)
 [![Twitter Follow](https://img.shields.io/twitter/follow/sendgrid.svg?style=social&label=Follow)](https://twitter.com/sendgrid)
@@ -27,7 +27,7 @@ If you are looking for the Twilio SendGrid API client library, please see [this
 # Announcements
 **The default branch name for this repository has been changed to `main` as of 07/27/2020.**
 
-All updates to this project are documented in our [CHANGELOG](https://github.com/sendgrid/csharp-http-client/blob/master/CHANGELOG.md).
+All updates to this project are documented in our [CHANGELOG](CHANGELOG.md).
 
 <a name="installation"></a>
 # Installation
@@ -45,7 +45,7 @@ PM> Install-Package SendGrid.CSharp.Http.Client
 ```
 
 Once you have the library properly referenced in your project, you can include calls to them in your code.
-For a sample implementation, check the [Example](https://github.com/sendgrid/csharp-http-client/tree/master/Example) folder.
+For a sample implementation, check the [Example](Example) folder.
 
 Add the following namespace to use the library:
 ```csharp
@@ -101,13 +101,13 @@ 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 projects, please see our [CONTRIBUTING](https://github.com/sendgrid/csharp-http-client/blob/master/CONTRIBUTING.md) guide for details.
+We encourage contribution to our projects, please see our [CONTRIBUTING](CONTRIBUTING.md) guide for details.
 
 Quick links:
 
-- [Feature Request](https://github.com/sendgrid/csharp-http-client/blob/master/CONTRIBUTING.md#feature-request)
-- [Bug Reports](https://github.com/sendgrid/csharp-http-client/blob/master/CONTRIBUTING.md#submit-a-bug-report)
-- [Improvements to the Codebase](https://github.com/sendgrid/csharp-http-client/blob/master/CONTRIBUTING.md#improvements-to-the-codebase)
+- [Feature Request](CONTRIBUTING.md#feature-request)
+- [Bug Reports](CONTRIBUTING.md#submit-a-bug-report)
+- [Improvements to the Codebase](CONTRIBUTING.md#improvements-to-the-codebase)
 
 <a name="thanks"></a>
 # Thanks

USAGE.md

@@ -1,6 +1,6 @@
 # Usage
 
-- [Example Code](https://github.com/sendgrid/csharp-http-client/blob/master/Example/Example.cs)
+- [Example Code](Example/Example.cs)
 
 ## Environment Variables