README.md in osakana-0.2.1 vs README.md in osakana-0.3.0

@@ -6,14 +6,20 @@
 
 Osakana is a Swiss army knife tool for my phishing research.
 
 ## Features
 
-- [Ayashige](https://github.com/ninoseki/ayashige) lookup
-- Censys lookup
-- Check newly registered domains on DNPedia by keyword
-- Slack integration
+- Lookup supports:
+  - [Ayashige](https://github.com/ninoseki/ayashige) lookup
+  - Censys lookup
+  - DNPedia (newly registered domains) lookup
+  - urlscan.io lookup
+- IoC enrichment:
+  - SecurityTrails integration (an API Key is required)
+  - Robtex integration
+- Notification:
+  - Slack notification
 
 ## Prerequisites
 
 - Ruby (> 2.5)
 
@@ -30,26 +36,33 @@
 Commands:
   osakana ayashige_lookup [KEYWORD]      # lookup on Ayashige by a given keyword
   osakana censys_lookup [QUERY]          # lookup on Censys by a given query
   osakana check_newly_domains [KEYWORD]  # check newly registered domains on DNPedia by a given keyword
   osakana help [COMMAND]                 # Describe available commands or one specific command
+  osakana urlscan_lookup [QUERY]         # look up on urlscan.io by a given query
 ```
 
 ## Configuration
 
 ### Censys
 
 Please set the following environmental variables for enabling Censys lookup.
 
-- CENSYS_ID: your Censys API ID
-- CENSYS_SECRET: your Censys secret key
+- `CENSYS_ID`: your Censys API ID
+- `CENSYS_SECRET`: your Censys secret key
 
+### SecurityTrails
+
+Please set the following environmental variable for enabling SecurityTrails integration.
+
+- `SECURITYTRAILS_API_KEY`: your SecurityTrails API key
+
 ### Slack
 
-Please set the following environmental variables for enabling Slack integration.
+Please set the following environmental variables for enabling Slack notification.
 
-- SLACK_WEBHOOK_URL: A Slack webhook URL.
-- SLACK_CHANNEL_NAME: A Slask channel name which will be notified.
+- `SLACK_WEBHOOK_URL`: A Slack webhook URL.
+- `SLACK_CHANNEL_NAME`: A Slask channel name which will be notified.
 
 ## Screenshots
 
 ### `osakana censys_lookup`