Ditch Travis CI and switch to GitHub actions

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+jobs:
+  Tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: |
+          pip install jsonschema yamllint
+      - name: Run tests
+        run: |
+          make lint

.travis.yml

@@ -1,8 +0,0 @@
----
-language: python
-python:
-  - 3.6
-install:
-  - pip install jsonschema yamllint
-script:
-  - make lint

README.md

@@ -1,7 +1,6 @@
-# GTFOBins [![Build Status][]][travis]
+# GTFOBins
 
-[Build Status]: https://travis-ci.com/GTFOBins/GTFOBins.github.io.svg?branch=master
-[travis]: https://travis-ci.com/GTFOBins/GTFOBins.github.io
+[![CI status](https://github.com/GTFOBins/GTFOBins.github.io/actions/workflows/ci.yml/badge.svg)](https://github.com/GTFOBins/GTFOBins.github.io/actions?query=workflow:CI)
 
 GTFOBins is a curated list of Unix binaries that can be used to bypass local security restrictions in misconfigured systems.