MAINT: renaming the default branch to main (#219)

Author: bsipocz

.github/workflows/tests.yml

@@ -5,7 +5,7 @@ name: continuous-integration
 
 on:
   push:
-    branches: [master]
+    branches: [main]
     tags:
       - 'v*'
   pull_request:

README.md

@@ -183,9 +183,9 @@ By default, code tabs are labelled with the language name, though a custom label
 
 The tab label is used to group tabs, including `code-tabs`. As such, the same custom label should be used to group related tabs.
 
-[github-ci]: https://github.com/executablebooks/sphinx-tabs/workflows/continuous-integration/badge.svg?branch=master
+[github-ci]: https://github.com/executablebooks/sphinx-tabs/workflows/continuous-integration/badge.svg?branch=main
 [github-link]: https://github.com/executablebooks/sphinx-tabs
 [pypi-badge]: https://img.shields.io/pypi/v/sphinx-tabs.svg
 [pypi-link]: https://pypi.org/project/sphinx-tabs
-[codecov-badge]: https://codecov.io/gh/executablebooks/sphinx-tabs/branch/master/graph/badge.svg
+[codecov-badge]: https://codecov.io/gh/executablebooks/sphinx-tabs/branch/main/graph/badge.svg
 [codecov-link]: https://codecov.io/gh/executablebooks/sphinx-tabs