Adapt to the new default branch name of main

Author: waiting-for-dev

.circleci/config.yml

@@ -61,7 +61,7 @@ workflows:
           filters:
             branches:
               only:
-                - master
+                - main
     jobs:
       - run-specs:
           name: *name

README.md

@@ -1,7 +1,7 @@
 # Solidus Auth Devise
 
 [![CircleCI](https://circleci.com/gh/solidusio/solidus_auth_devise.svg?style=shield)](https://circleci.com/gh/solidusio/solidus_auth_devise)
-[![codecov](https://codecov.io/gh/solidusio/solidus_auth_devise/branch/master/graph/badge.svg)](https://codecov.io/gh/solidusio/solidus_auth_devise)
+[![codecov](https://codecov.io/gh/solidusio/solidus_auth_devise/branch/main/graph/badge.svg)](https://codecov.io/gh/solidusio/solidus_auth_devise)
 
 Provides authentication services for Solidus, using the Devise gem.