fix: Use new Printful auth header format (#82)

BREAKING CHANGE: Migrate Printful API token to new format. See: https://help.printful.com/hc/en-us/articles/4632388335260-What-should-I-know-about-API-key-to-API-token-migration

Author: notrab

gatsby-source-printful/lib/printful.js

@@ -1,7 +1,5 @@
 const fetch = require('isomorphic-unfetch')
 
-const { base64Encode } = require('./utils')
-
 class PrintfulClient {
   constructor({ apiKey }) {
     this.printfulApiKey = apiKey
@@ -13,7 +11,7 @@ class PrintfulClient {
     const response = await fetch(uri, {
       method,
       headers: {
-        Authorization: `Basic ${base64Encode(this.printfulApiKey)}`
+        Authorization: `Bearer ${this.printfulApiKey}`
       }
     })
 

gatsby-source-printful/lib/utils.js

@@ -1,5 +1,3 @@
-exports.base64Encode = (string) => Buffer.from(string).toString('base64')
-
 exports.parseNameForSlug = (name) => name.replace(/[\s-]+/g, '-').toLowerCase()
 
 exports.parsePriceString = (price) => parseFloat(price)