docs: remove --save (#263)

Mohamed Nainar · web-flow · commit 8cea63aadba5 · 2020-02-26T23:34:22.000+08:00
diff --git a/README.md b/README.md
@@ -25,7 +25,7 @@
 **npm**
 
 ```bash
-npm install @vue/composition-api --save
+npm install @vue/composition-api
 ```
 
 **yarn**
