[String] Correct inflection of axis

Author: Vladislav Iurciuc

Inflector/EnglishInflector.php

@@ -166,6 +166,9 @@ final class EnglishInflector implements InflectorInterface
         // Fourth entry: Whether the suffix may succeed a consonant
         // Fifth entry: plural suffix, normal
 
+        // axes (axis)
+        ['sixa', 4, false, false, 'axes'],
+
         // criterion (criteria)
         ['airetirc', 8, false, false, 'criterion'],
 

Tests/Inflector/EnglishInflectorTest.php

@@ -185,6 +185,7 @@ public static function pluralizeProvider()
             ['arch', 'arches'],
             ['atlas', 'atlases'],
             ['axe', 'axes'],
+            ['axis', 'axes'],
             ['baby', 'babies'],
             ['bacterium', 'bacteria'],
             ['base', 'bases'],