Update README.md

Author: EvilLord666

README.md

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 3. Use for **template-based src code generator**
 4. Other text proccessing
 
+[Go Report Card](https://goreportcard.com/report/github.com/wissance/stringFormatter)
+
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 ## ✨ 1 Features
 
 🔤 Flexible Syntax: Supports both indexed / positional (`{0}`) and named (`{user}`) *placeholders* in templates.