Switch default branch from master to main

Author: thibaudcolas

CONTRIBUTING.md

@@ -40,7 +40,7 @@ npm run lint
 - Update the version number in `package.json`, following semver.
 - Make sure the documentation is up-to-date (`npm run build`)
 - Make a PR and squash merge it.
-- Back on master with the PR merged, use `npm publish`.
+- Back on main with the PR merged, use `npm publish`.
 - Head over to [https://www.npmjs.com/package/eslint-config-torchbox](https://www.npmjs.com/package/eslint-config-torchbox) and check that all is well.
 - Finally, go to GitHub and create tag then a release for the new version, with the corresponding CHANGELOG entry as content.
 - Done!

README.md

@@ -1,6 +1,6 @@
-# [eslint-config-torchbox](https://www.npmjs.com/package/eslint-config-torchbox) [<img src="https://raw.githubusercontent.com/torchbox/eslint-config-torchbox/master/.github/eslint-logo.svg?sanitize=true" alt="ESLint" width="90" height="90" align="right">](https://eslint.org)
+# [eslint-config-torchbox](https://www.npmjs.com/package/eslint-config-torchbox) [<img src="https://raw.githubusercontent.com/torchbox/eslint-config-torchbox/main/.github/eslint-logo.svg?sanitize=true" alt="ESLint" width="90" height="90" align="right">](https://eslint.org)
 
-[![eslint-config-torchbox on npm](https://img.shields.io/npm/v/eslint-config-torchbox.svg)](https://www.npmjs.com/package/eslint-config-torchbox) [![Build Status](https://travis-ci.com/torchbox/eslint-config-torchbox.svg?branch=master)](https://travis-ci.com/torchbox/eslint-config-torchbox)
+[![eslint-config-torchbox on npm](https://img.shields.io/npm/v/eslint-config-torchbox.svg)](https://www.npmjs.com/package/eslint-config-torchbox) [![Build Status](https://travis-ci.com/torchbox/eslint-config-torchbox.svg?branch=main)](https://travis-ci.com/torchbox/eslint-config-torchbox)
 
 > Shareable ESLint config following Torchbox’s code style.