Fix installation command

Author: JJCLane

README.md

@@ -5,7 +5,7 @@ an existing table in a migration by initially adding the column as nullable and
 It also maps Laravel datatypes that aren't supported in SQLite to avoid [this](https://github.com/laravel/framework/issues/8840).
 
 ## Installation
-`composer require-dev jjclane/laravel-sqlite-migrations --dev`
+`composer require jjclane/laravel-sqlite-migrations --dev`
 
 ## How to use
 ````php