PHP 7.4 support

.travis.yml

@@ -4,6 +4,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
 
 before_script:
   - wget http://getcomposer.org/composer.phar

README.md

@@ -78,8 +78,6 @@ $executor->addFunction('abs', function($arg) {return abs($arg);});
 ```
 Function default parameters are not supported at this time.
 
-Default parameters are not currently supported.
-
 ## Operators:
 Default operators: `+ - * / ^`
 

tests/MathTest.php

@@ -77,7 +77,7 @@ class MathTest extends \PHPUnit\Framework\TestCase
             ['log1p(1.5)'],
             ['max(1.5, 3.5)'],
             ['min(1.5, 3.5)'],
-            ['octdec(1.5)'],
+            ['octdec("15")'],
             ['pi()'],
             ['pow(1.5, 3.5)'],
             ['rad2deg(1.5)'],