Smarty v5 update test, initial code setup

src/Compile/Modifier/ModifierCompilerInterface.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Smarty\Compile\Modifier;
+
+interface ModifierCompilerInterface {
+
+	/**
+	 * Compiles code for the modifier
+	 *
+	 * @param array $params array with attributes from parser
+	 * @param \Smarty\Compiler\Template $compiler compiler object
+	 *
+	 * @return string compiled code
+	 * @throws \Smarty\CompilerException
+	 */
+	public function compile($params, \Smarty\Compiler\Template $compiler);
+}