Follow up to mmcdole#150: Added support for JSON feed (mmcdole#154)

* Added the structure for JSON Feed

* Updated package name of json and added parser and test wrapper

* Added tests for sample json feed parser

* Added detector for feed type json

* Removed unwated dependencies

* Added parser and empty translator for json feeds

* Added translator functions for json feed

* Added test for json translator

* Added tests for content text and banner image

* Added tests for invalid feed and string output

* Added tests for json in parser

* Updated README

* Fixed REAME formatting

* check for xml first

* update dependencies

Co-authored-by: Sudhanshu Raheja <[email protected]>

Add sort.Interface implementation for Feed (mmcdole#141)

Order Feed.Items by oldest to newest publish time.

Fix broken image

Fix broken atom test