ci: use GH Actions istead of Travis CI

.github/workflows/lint.yml

@@ -0,0 +1,20 @@
+name: Linting and style checking
+
+on: [push, pull_request]
+
+jobs:
+  luacheck:
+    name: Luacheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Prepare
+        run: |
+          sudo apt-get update
+          sudo add-apt-repository universe
+          sudo apt install luarocks -y
+          sudo luarocks install luacheck
+
+      - name: Run Luacheck
+        run: ./scripts/style-check.sh

.travis.yml

@@ -1,11 +0,0 @@
-
-language: c
-dist: bionic
-before_install:
-  - sudo apt-get update
-  - sudo add-apt-repository universe
-  - sudo apt install luarocks -y
-  - sudo luarocks install luacheck
-
-script:
-  - ./scripts/style-check.sh

README.md

@@ -2,7 +2,7 @@
 Traditionnal highlighting (left) vs Treesitter-based highlighting (right).
 
 [![Gitter](https://badges.gitter.im/nvim-treesitter/community.svg)](https://gitter.im/nvim-treesitter/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
-[![Build Status](https://travis-ci.com/nvim-treesitter/nvim-treesitter.svg?branch=master)](https://travis-ci.com/nvim-treesitter/nvim-treesitter)
+![Build Status](https://github.com/nvim-treesitter/nvim-treesitter/workflows/.github/workflows/lint.yml/badge.svg?branch=master)
 # nvim-treesitter
 Treesitter configurations and abstraction layer for Neovim.