Fixing tests

Most were a case of adding void return statement to setUp and tearDown,
also needed to add 6th `null` param to indieauth method. Its for
code_verifier, issue created to work out what I should actually be doing
with that.

tests/Feature/Admin/ContactsTest.php

@@ -15,7 +15,7 @@ class ContactsTest extends TestCase
 {
     use DatabaseTransactions;
 
-    public function tearDown()
+    protected function tearDown(): void
     {
         if (file_exists(public_path() . '/assets/profile-images/tantek.com/image')) {
             unlink(public_path() . '/assets/profile-images/tantek.com/image');

tests/Feature/ParseCachedWebMentionsTest.php

@@ -12,7 +12,7 @@ class ParseCachedWebMentionsTest extends TestCase
 {
     use DatabaseTransactions;
 
-    public function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
@@ -43,7 +43,7 @@ class ParseCachedWebMentionsTest extends TestCase
         $this->assertTrue($webmentionTantek->updated_at->gt($webmentionTantek->created_at));
     }
 
-    public function tearDown()
+    protected function tearDown(): void
     {
         $fs = new FileSystem();
         if ($fs->exists(storage_path() . '/HTML/https')) {