Document lts option

README.md

@@ -38,6 +38,17 @@ jobs:
       - run: npm test
 ```
 
+Get the LTS version:
+```yaml
+steps:
+- uses: actions/checkout@master
+- uses: actions/setup-node@master
+  with:
+    version: lts
+- run: npm install
+- run: npm test
+```
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)

action.yml

@@ -3,7 +3,7 @@ description: 'Setup a Node.js environment and add it to the PATH, additionally p
 author: 'GitHub'
 inputs: 
   version:
-    description: 'Version Spec of the version to use.  Examples: 10.x, 10.15.1, >=10.15.0'
+    description: 'Version Spec of the version to use.  Examples: 10.x, 10.15.1, >=10.15.0, lts'
     default: '10.x'
 runs:
   using: 'node12'