Rename main branch from master to main

.github/workflows/node.js.yml

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

README.md

@@ -1,6 +1,6 @@
 # addok-cluster
 
-![npm](https://img.shields.io/npm/v/addok-cluster) ![node-current](https://img.shields.io/node/v/addok-cluster) [![Coverage Status](https://coveralls.io/repos/github/livingdata-co/addok-cluster/badge.svg?branch=master)](https://coveralls.io/github/livingdata-co/addok-cluster?branch=master) ![Libraries.io dependency status for latest release](https://img.shields.io/librariesio/release/npm/addok-cluster)
+![npm](https://img.shields.io/npm/v/addok-cluster) ![node-current](https://img.shields.io/node/v/addok-cluster) [![Coverage Status](https://coveralls.io/repos/github/livingdata-co/addok-cluster/badge.svg?branch=main)](https://coveralls.io/github/livingdata-co/addok-cluster?branch=main) ![Libraries.io dependency status for latest release](https://img.shields.io/librariesio/release/npm/addok-cluster)
 
 A very fast and efficient way to use [addok](https://github.com/addok/addok) geocoding capabilities in your Node.js process.