Update Octokit/Actions Toolkit

The Actions and Octokit dependencies have been bumped. Since they contain major version updates, this also constitutes a major version update for this action:

{
    "@actions/core": "^1.2.4",
    "@actions/github": "^4.0.0",
    "@actions/io": "^1.0.2",
    "@octokit/core": "^3.1.2",
    "@octokit/plugin-paginate-rest": "^2.3.0",
    "@octokit/plugin-rest-endpoint-methods": "^4.1.2"
}

Vendor third-party licenses

This release includes vendored licenses for this action's npm dependencies.

Update actions/github

This updates the NPM package @actions/github to the latest version, which includes updates to the rest API interface.

Add @actions/io

This release includes the @actions/io package, exposed as io in the script.

Initial release

This is the initial major release of actions/github-script

Add @actions/core

This release adds the core variable to the script, which gives one access to the @actions/core package.

Fix version references

The previous release had 0.6.0 in package*.json, and the README. This release has proper versions, because pedantry.

Update @actions dependencies

0.7.0

Update README.md

Fix async/await

Version 0.5.0 targeted an older version of ECMAScript. This version builds the action for ES2018.

Default to github-token

This release includes #24, which defaults to using the default GitHub token from the workflow context.