Use ncc to compile action

This allows the node_modules to be removed from the repository, as is already done in the `arduino/setup-arduino-cli`,
`arduino/arduino-lint-action`, and `arduino/create-changelog` actions.

.gitignore

@@ -1 +1,6 @@
+# Dependency directory
+node_modules/
+
+# Ignore built ts files
 __tests__/runner/*
+lib/**/*

README.md

@@ -50,15 +50,11 @@ See [step-debug-logs](https://github.com/actions/toolkit/blob/master/docs/action
 
 ## Release
 
-We check in the `node_modules` to provide runtime dependencies to the system
-using the Action, so be careful not to `git add` all the development dependencies
-you might have under your local `node_modules`. To release a new version of the
-Action the workflow should be the following:
+To release a new version of the Action the workflow should be the following:
 
-1. `npm install` to add all the dependencies, included development.
+1. `npm install` to install the dependencies.
 1. `npm run test` to see everything works as expected.
 1. `npm run build` to build the Action under the `./lib` folder.
-1. `rm -rf node_modules` to remove all the dependencies.
-1. `npm install --production` to add back **only** the runtime dependencies.
-1. `git add lib node_modules` to check in the code that matters.
+1. `npm run pack` to package for distribution
+1. `git add src dist` to check in the code that matters.
 1. open a PR and request a review.

action.yml

@@ -10,4 +10,4 @@ inputs:
 
 runs:
   using: 'node12'
-  main: 'lib/main.js'
+  main: "dist/index.js"