add documentation

README.md

@@ -32,17 +32,17 @@ const scraper = require('deblan-scraper')
 
 const options = {
   url: 'https://github.com/foo/bar',
-	acceptAllStatus: false, // Optional
-	method: 'GET', // Optional
+  acceptAllStatus: false, // Optional, default is `false`
+  method: 'GET', // Optional, default is `GET`
 }
 
 const selector = '.repository-content .numbers-summary li:nth-child(4) a'
 
 const filters = {
-    tags: null,
-    breaks: null,
-    spaces: null,
-    trim: null,
+  tags: null, // Removes tags. You can specify the tags to remove (separated by comma)
+  breaks: null, // Removes breaks (\n, \r)
+  spaces: null, // Replaces 2 successive spaces by 1, except breaks
+  trim: null, // Strips whitespaces from the beginning and end of the value
 }
 
 scraper(