README.md in gindex-0.2.0 vs README.md in gindex-0.3.0

@@ -1,52 +1,60 @@
 # g index
 
 :speedboat: Instant **concurrent** index migrations for Rails
 
+## Installation
+
+Add this line to your application’s Gemfile:
+
+```ruby
+gem "gindex", group: :development
+```
+
+## How It Works
+
 ```sh
 rails g index users email
 ```
 
 generates:
 
 ```ruby
-class AddIndexOnEmailToUsers < ActiveRecord::Migration[6.0]
+class AddIndexOnEmailToUsers < ActiveRecord::Migration[6.1]
   disable_ddl_transaction!
 
   def change
-    add_index :users, [:email], algorithm: :concurrently
+    add_index :users, :email, algorithm: :concurrently
   end
 end
 ```
 
 Also works with multi-column indexes
 
 ```sh
 rails g index deliveries store_id delivered_at
 ```
 
-## Installation
-
-Add this line to your application’s Gemfile:
-
-```ruby
-gem 'gindex', group: :development
-```
-
-And then execute:
-
-```sh
-bundle
-```
-
 ## TODO
 
 - add `:name` option to long index names
 
+## History
+
+View the [changelog](https://github.com/ankane/gindex/blob/master/CHANGELOG.md)
+
 ## Contributing
 
 Everyone is encouraged to help improve this project. Here are a few ways you can help:
 
 - [Report bugs](https://github.com/ankane/gindex/issues)
 - Fix bugs and [submit pull requests](https://github.com/ankane/gindex/pulls)
 - Write, clarify, or fix documentation
 - Suggest or add new features
+
+To get started with development:
+
+```sh
+git clone https://github.com/ankane/gindex.git
+cd gindex
+bundle install
+```