Merge pull request #40 from mijoharas/fix-incorrect-usage-of-got

Got version 11.8.6 throws an error with auth option.

lib/exec.js

@@ -17,7 +17,8 @@ function * checkStatus(context, heroku, configVars) {
   var execUrl = _execUrl(context, configVars)
 
   return cli.got(`https://${execUrl.host}`, {
-    auth: execUrl.auth,
+    username: execUrl.username,
+    password: execUrl.password,
     path: _execApiPath(configVars),
     headers: _execHeaders(),
     method: 'GET'
@@ -164,7 +165,8 @@ function updateClientKey(context, heroku, configVars, callback) {
     var dyno = _dyno(context)
 
     return cli.got(`https://${execUrl.host}`, {
-      auth: execUrl.auth,
+      username: execUrl.username,
+      password: execUrl.password,
       path: `${_execApiPath(configVars)}/${dyno}`,
       method: 'PUT',
       headers: {..._execHeaders(), 'content-type': 'application/json'},
@@ -211,9 +213,10 @@ function _execUrl(context, configVars) {
     } else {
       urlString = process.env.HEROKU_EXEC_URL
     }
-    var execUrl = url.parse(urlString)
-    execUrl.auth = `${context.app}:${process.env.HEROKU_API_KEY || context.auth.password}`
-    return execUrl
+    var execUrl = url.parse(urlString);
+    execUrl.username = context.app;
+    execUrl.password = process.env.HEROKU_API_KEY || context.auth.password;
+    return execUrl;
   }
 }