prepared readme for 1.8.0 version

adityapatadia · web-flow · commit 203210e94849 · 2018-02-10T10:50:52.000+05:30
diff --git a/README.md b/README.md
@@ -22,11 +22,13 @@ If using [Composer](https://getcomposer.org/), in your `composer.json` file add:
 ```json
 {
     "require": {
-        "gumlet/php-image-resize": "1.7.*"
+        "gumlet/php-image-resize": "1.8.*"
     }
 }
 ```
 
+If you are still using PHP 5.3, please install version ```1.7.0``` or below of this library.
+
 Otherwise:
 
 ```php

Original file line number	Diff line number	Diff line change
@@ -22,11 +22,13 @@ If using [Composer](https://getcomposer.org/), in your `composer.json` file add:
`22`	`22`	```json
`23`	`23`	`{`
`24`	`24`	`"require": {`
`25`		`- "gumlet/php-image-resize": "1.7.*"`
	`25`	`+ "gumlet/php-image-resize": "1.8.*"`
`26`	`26`	`}`
`27`	`27`	`}`
`28`	`28`	```
`29`	`29`
	`30`	+If you are still using PHP 5.3, please install version ```1.7.0``` or below of this library.
	`31`	`+`
`30`	`32`	`Otherwise:`
`31`	`33`
`32`	`34`	```php