Update tests and readme

Author: Riimu

README.md

@@ -18,8 +18,7 @@ code that fits your purposes. You can create very compact code, when you need to
 limit the size of the output, or you can create code in the style that actually
 fits in any of your dynamically generated PHP files.
 
-The API documentation, which can be generated using Apigen, can be read online
-at: http://kit.riimu.net/api/phpencoder/
+The API documentation is available at: http://kit.riimu.net/api/phpencoder/
 
 [![Travis](https://img.shields.io/travis/Riimu/Kit-PHPEncoder.svg?style=flat-square)](https://travis-ci.org/Riimu/Kit-PHPEncoder)
 [![Scrutinizer](https://img.shields.io/scrutinizer/g/Riimu/Kit-PHPEncoder.svg?style=flat-square)](https://scrutinizer-ci.com/g/Riimu/Kit-PHPEncoder/)

tests/tests/EncodingTest.php

@@ -18,8 +18,8 @@ public function testOptions()
             ->setMethods(['getDefaultOptions', 'supports', 'encode'])
             ->getMock();
 
-        $mock->expects($this->any())->method('getDefaultOptions')->will($this->returnValue(['test' => false]));
-        $mock->expects($this->any())->method('supports')->will($this->returnValue(true));
+        $mock->expects($this->any())->method('getDefaultOptions')->willReturn(['test' => false]);
+        $mock->expects($this->any())->method('supports')->willReturn(true);
         $mock->expects($this->any())->method('encode')->will($this->returnCallback(
             function ($value, $depth, $options, $encoder) {
                 return !empty($options['test']) ? strtoupper($value) : $value;

tests/tests/ObjectEncodingTest.php

@@ -54,7 +54,7 @@ public function testPHPValue()
             ->getMock();
 
         $encoder = new PHPEncoder();
-        $mock->expects($this->once())->method('toPHPValue')->will($this->returnValue([]));
+        $mock->expects($this->once())->method('toPHPValue')->willReturn([]);
         $this->assertSame([], eval('return ' . $encoder->encode($mock) . ';'));
     }
 
@@ -65,7 +65,7 @@ public function testPHP()
             ->getMock();
 
         $encoder = new PHPEncoder();
-        $mock->expects($this->once())->method('toPHP')->will($this->returnValue('"Mocked"'));
+        $mock->expects($this->once())->method('toPHP')->willReturn('"Mocked"');
         $this->assertSame('"Mocked"', $encoder->encode($mock));
     }