Add a BANKCODE attribute to the API

New responses:

URL: https://ifsc.razorpay.com/HDFC0000186

{
  "RTGS": "true",
  "ADDRESS": "SR-01, RAJENDRA RAM PLAZAPLOT NO 875,  EXHIBITION ROADPATNABIHAR800001",
  "CONTACT": "8602666161",
  "DISTRICT": "PATNA",
  "CITY": "PATNA",
  "STATE": "BIHAR",
  "BRANCH": "PATNA - EXHIBITION ROAD - BIHAR",
  "BANK": "HDFC Bank",
  "IFSC": "HDFC0000186",
  "BANKCODE": "HDFC"
}

URL: https://ifsc.razorpay.com/YESB0NSB001

{
  "BRANCH": "NAGAR SAHKARI BANK MAHARAJGANJ",
  "ADDRESS": "CIVIL LINES, PHARENDA ROAD, MAHARAJGANJ - 273303",
  "CONTACT": "9839987749",
  "CITY": "MAHARAJGANJ",
  "DISTRICT": "MAHARAJGANJ",
  "STATE": "UTTAR PRADESH",
  "BANK": "Nagar Sahakari Bank Maharajganj",
  "IFSC": "YESB0NSB001",
  "BANKCODE": "NGBX"
}

Also see if we can switch RTGS to a boolean field.

razorpay / ifsc-api

Add a BANKCODE attribute to the API #12