VarSetType rename to SetVarType, add phan/phpstan/phpunit tests

Breaking change:
VarSetType/VarSetTypeNull classes have been renamed to
SetVarType/SetVarTypeNull

Added phan/phpstan static checkes and settings
Add phpunit tests (in test/phpunit) that are an exact copy from the
trunk folder unit tests

The phan/phpstan tests have been updated to work with the composer layout

config files with static defines needed for certain classes are stored
in test/configs (config.php, config.other.php, config.master.php)

test/phpunit/CoreLibsOutputFormElementsTest.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test class for Output\Form\Elements
+ * @coversDefaultClass \CoreLibs\Output\Form\Elements
+ * @testdox \CoreLibs\Output\Form\Elements method tests
+ */
+final class CoreLibsOutputFormElementsTest extends TestCase
+{
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox Output\Form\Elements Class tests
+	 *
+	 * @return void
+	 */
+	public function testOutputFormElements()
+	{
+		// $this->assertTrue(true, 'Output Form Elements Tests not implemented');
+		$this->markTestIncomplete(
+			'Output\Form\Elements Tests have not yet been implemented'
+		);
+		// $this->markTestSkipped('No implementation for Output\Form\Elements at the moment');
+	}
+}
+
+// __END__