Fix package name in README

Author: cmfcmf

README.md

@@ -3,7 +3,7 @@ Bindings for using [Formik](https://github.com/jaredpalmer/formik) with [Reactst
 
 ## Getting Started
 
-    npm install formik-material-ui
+    npm install reactstrap-formik
 
 ## Usage Examples
   * Text Input [Example](https://codesandbox.io/s/xl6mx6w8z4)
@@ -15,4 +15,4 @@ Bindings for using [Formik](https://github.com/jaredpalmer/formik) with [Reactst
     npm install
     npm run storybook
 
-[Demo](https://shoaibkhan94.github.io/reactstrap-formik)
+[Demo](https://shoaibkhan94.github.io/reactstrap-formik)