Avoid incldues

Author: pfhayes

lib/rules/jsx-child-element-spacing.js

@@ -61,7 +61,7 @@ module.exports = {
 
     const isInlineElement = node => (
       node.type === 'JSXElement' &&
-      INLINE_ELEMENTS.includes(elementName(node))
+      INLINE_ELEMENTS.indexOf(elementName(node)) !== -1
     );
 
     const TEXT_FOLLOWING_ELEMENT_PATTERN = /^\s*\n\s*\S/;