deps - replace promise-request with fetch

app/scripts/lib/config-manager.js

@@ -1,7 +1,6 @@
 const Migrator = require('pojo-migrator')
 const MetamaskConfig = require('../config.js')
 const migrations = require('./migrations')
-const rp = require('request-promise')
 const ethUtil = require('ethereumjs-util')
 const normalize = require('./sig-util').normalize
 
@@ -301,9 +300,9 @@ ConfigManager.prototype.getCurrentFiat = function () {
 
 ConfigManager.prototype.updateConversionRate = function () {
   var data = this.getData()
-  return rp(`https://www.cryptonator.com/api/ticker/eth-${data.fiatCurrency}`)
-  .then((response) => {
-    const parsedResponse = JSON.parse(response)
+  return fetch(`https://www.cryptonator.com/api/ticker/eth-${data.fiatCurrency}`)
+  .then(response => response.json())
+  .then((parsedResponse) => {
     this.setConversionPrice(parsedResponse.ticker.price)
     this.setConversionDate(parsedResponse.timestamp)
   }).catch((err) => {

package.json

@@ -85,7 +85,6 @@
     "redux": "^3.0.5",
     "redux-logger": "^2.3.1",
     "redux-thunk": "^1.0.2",
-    "request-promise": "^4.1.1",
     "sandwich-expando": "^1.0.5",
     "textarea-caret": "^3.0.1",
     "three.js": "^0.73.2",