chore: update license references

Author: Sam Harrison

README.md

@@ -5,7 +5,7 @@
 [![Email Notifications Badge](https://dx.sendgrid.com/badge/php)](https://dx.sendgrid.com/newsletter/php)
 [![Twitter Follow](https://img.shields.io/twitter/follow/sendgrid.svg?style=social&label=Follow)](https://twitter.com/sendgrid)
 [![GitHub contributors](https://img.shields.io/github/contributors/sendgrid/php-http-client.svg)](https://github.com/sendgrid/php-http-client/graphs/contributors)
-[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE.md)
+[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 
 **Quickly and easily access any RESTful or RESTful-like API.**
 
@@ -191,4 +191,4 @@ If you've instead found a bug in the library or would like new features added, g
 
 <a name="license"></a>
 # License
-[The MIT License (MIT)](LICENSE.md)
+[The MIT License (MIT)](LICENSE)

test/unit/FilesExistTest.php

@@ -19,7 +19,7 @@ public function testFileArePresentInRepo()
         $this->assertFileExists("$rootDir/CONTRIBUTING.md");
         $this->assertFileExists("$rootDir/Dockerfile");
         $this->assertFileExists("$rootDir/ISSUE_TEMPLATE.md");
-        $this->assertFileExists("$rootDir/LICENSE.md");
+        $this->assertFileExists("$rootDir/LICENSE");
         $this->assertFileExists("$rootDir/PULL_REQUEST_TEMPLATE.md");
         $this->assertFileExists("$rootDir/README.md");
         $this->assertFileExists("$rootDir/TROUBLESHOOTING.md");

test/unit/LicenceYearTest.php

@@ -6,11 +6,11 @@
 
 class LicenceYearTest extends TestCase
 {
-    public function testConstructor()
+    public function testLicenseYear()
     {
         $rootDir = __DIR__ . '/../..';
 
-        $license = explode("\n", file_get_contents("$rootDir/LICENSE.md"));
+        $license = explode("\n", file_get_contents("$rootDir/LICENSE"));
         $copyright = trim($license[2]);
 
         $year = date('Y');