chore: Rename default branch as "main", update CI actions

Author: eemeli

.github/workflows/deploy.yml

@@ -5,7 +5,7 @@ on:
   # only for the default branch.
   push:
     branches:
-      - master
+      - main
     paths:
       - '.github/workflows/deploy.yml'
       - 'book.toml'
@@ -20,7 +20,7 @@ jobs:
       MDBOOK_VERSION: v0.4.36
     steps:
       - name: Clone repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
       - name: Install mdbook
         run: |
           mkdir installed-bins

.github/workflows/test.yml

@@ -3,21 +3,17 @@ name: Run tests
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
-    branches:
-      - master
   workflow_dispatch:
 
 jobs:
   test:
     name: Run tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 20
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
       - run: npm ci
       - run: npm run lint
       - run: npm test

README.md

@@ -37,7 +37,7 @@ validate your work:
 
 This repository contains the reference implementation of the parser. Other implementations exist which should be preferred for use in production and in tooling.
 
-  - The JavaScript implementation at [`fluent.js`](https://github.com/projectfluent/fluent.js), including the [React bindings](https://github.com/projectfluent/fluent.js/tree/master/fluent-react).
+  - The JavaScript implementation at [`fluent.js`](https://github.com/projectfluent/fluent.js), including the [React bindings](https://github.com/projectfluent/fluent.js/tree/main/fluent-react).
   - The Python implementation at [`python-fluent`](https://github.com/projectfluent/python-fluent).
   - The Rust implementation at [`fluent-rs`](https://github.com/projectfluent/fluent-rs).