Update CI for main branch rename

Author: maxdeviant

.github/workflows/ci.yml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [master]
+    branches: [main]
   pull_request:
-    branches: [master]
+    branches: [main]
 
 jobs:
   build:

README.md

@@ -1,7 +1,7 @@
 # redux-persist-transform-encrypt
 
 [![npm](https://img.shields.io/npm/v/redux-persist-transform-encrypt.svg?maxAge=3600)](https://www.npmjs.com/package/redux-persist-transform-encrypt)
-[![CI](https://github.com/maxdeviant/redux-persist-transform-encrypt/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/maxdeviant/redux-persist-transform-encrypt/actions/workflows/ci.yml)
+[![CI](https://github.com/maxdeviant/redux-persist-transform-encrypt/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/maxdeviant/redux-persist-transform-encrypt/actions/workflows/ci.yml)
 
 Encrypt your Redux store.