chore: switch to GitHub actions (#38)

.gitattributes

@@ -0,0 +1 @@
+* text eol=lf

.github/ISSUE_TEMPLATE.md

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+### Input (bash) code
+
+```sh
+
+```
+
+### Expected output ShellJS (JavaScript) code
+
+```javascript
+
+```
+
+### Actual output ShellJS (JavaScript) code
+
+```javascript
+
+```
+
+<!-- If you have any other comments to add, please add them below. -->

.github/SECURITY.md

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+# Security Policy
+
+Thank you for reaching out about security! Please note that this project is
+maintained on a best-effort basis, however I still intend to prioritize
+reviewing and addressing security issues.
+
+## Supported Versions
+
+I generally only support the latest release (see
+https://www.npmjs.com/package/shelljs-transpiler) and the web version hosted on
+GitHub Pages (https://nfischer.github.io/shelljs-transpiler/). My goal is to
+release security fixes as patch releases on top of whatever was most recently
+shipped.
+
+## Reporting a Vulnerability
+
+Please report security vulnerabilities to [email protected]. I should respond
+within a few days. Although it's not strictly required, it helps me out if you
+can include any proof of concept exploit code, suggested fix, etc.
+
+**Please do not publicly disclose the suspected vulnerability** until I have a
+chance to review your report. I'd like a chance to patch the code before the
+issue is known to the public.
+
+Please **only** use this email for security issues. It's also OK to use the
+email if you're legitimately unsure if this is a security issue (better safe
+than sorry). But for all other non-security issues, please use the GitHub issue
+tracker.

.github/workflows/main.yml

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+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 10
+          - 12
+          - 14
+          - 16
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+    steps:
+      - name: Checkout repository and submodules
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm run test
+      - uses: codecov/codecov-action@v2
+        with:
+          fail_ci_if_error: true

README.md

@@ -1,6 +1,6 @@
 # shelljs-transpiler
 
-[![Travis](https://img.shields.io/travis/nfischer/shelljs-transpiler.svg?style=flat-square)](https://travis-ci.org/nfischer/shelljs-transpiler)
+[![Build Status](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fnfischer%2Fshelljs-transpiler%2Fbadge%3Fref%3Dmaster&style=flat-square)](https://actions-badge.atrox.dev/nfischer/shelljs-transpiler/goto?ref=master)
 [![Codecov](https://img.shields.io/codecov/c/github/nfischer/shelljs-transpiler.svg?style=flat-square)](https://codecov.io/gh/nfischer/shelljs-transpiler)
 [![npm version](https://img.shields.io/npm/v/shelljs-transpiler.svg?style=flat-square)](https://www.npmjs.com/package/shelljs-transpiler)
 [![npm downloads](https://img.shields.io/npm/dt/shelljs-transpiler.svg?style=flat-square)](https://www.npmjs.com/package/shelljs-transpiler)

package.json

@@ -51,5 +51,8 @@
   "dependencies": {
     "minimist": "^1.2.0",
     "shelljs": "^0.7.0"
+  },
+  "engines": {
+    "node": ">=10"
   }
 }