Fix wrong composer command in readme (#33)

Chi-teck · web-flow · commit b1acf813ce37 · 2021-01-19T17:26:11.000+03:00
diff --git a/README.md b/README.md
@@ -22,7 +22,7 @@ This package implements file-based [PSR-16](https://www.php-fig.org/psr/psr-16/)
 The package could be installed with composer:
 
 ```
-composer install yiisoft/cache-file
+composer require yiisoft/cache-file
 ```
 
 ## Configuration
