Replace console.log by deprecate function

lib/kredits.js

@@ -1,6 +1,7 @@
 const ethers = require('ethers');
 
 const Preflight = require('./utils/preflight');
+const deprecate = require('./utils/deprecate');
 
 const ABIS = {
   Contributor: require('./abis/Contributor.json'),
@@ -50,19 +51,18 @@ class Kredits {
         return this.Kernel.getApp(contractName).then((address) => {
           this.addresses[contractName] = address;
         }).catch((error) => {
-          console.log(error);
           throw new Error(`Failed to get address for ${contractName} from DAO at ${this.Kernel.contract.address}
             - ${error.message}`
           );
         });
       });
 
-      return Promise.all(addressPromises).then(() => { return this });
+      return Promise.all(addressPromises).then(() => { return this; });
     });
   }
 
   static setup (provider, signer, ipfsConfig = null) {
-    console.log('Kredits.setup() is deprecated use new Kredits().init() instead');
+    deprecate('Kredits.setup() is deprecated use new Kredits().init() instead');
     return new Kredits(provider, signer, { ipfsConfig: ipfsConfig }).init();
   }
 
@@ -80,7 +80,7 @@ class Kredits {
   }
 
   get Contributors () {
-    console.log('Contributors is deprecated use Contributor instead');
+    deprecate('Contributors is deprecated use Contributor instead');
     return this.Contributor;
   }
 

lib/utils/deprecate.js

@@ -0,0 +1,5 @@
+/*eslint no-console: ["error", { allow: ["warn"] }] */
+
+module.exports = function deprecate (msg) {
+  console.warn(msg);
+};