message: fix: add up-to-date node version support info to README
  New node versions were recently added to the supported versions list,
  but the README was not updated with this information.
  Ticket:
diff: @@ -25,36 +25,32 @@ The release notes for the `core` module are [here](https://github.com/BitGo/BitG
  # NodeJS Version Support Policy
  -We only support [Long-Term Support](https://github.com/nodejs/Release) versions
  -of Node starting with [Node 8.9.0 (LTS)](https://nodejs.org/en/blog/release/v8.9.0).
  -
  -We specifically limit our support to LTS versions of Node, not because this
  -package won't work on other versions, but because we have a limited amount of
  -time, and supporting LTS offers the greatest return on that investment. It's
  -possible this package will work correctly on newer or older versions of Node.
  -
  -As each Node LTS version reaches its end-of-life we will remove that version
  -from the node engines property of our package's package.json file. Removing a
  -Node version is considered a breaking change and will entail the publishing of
  -a new major version of this package. We will not accept any requests to support
  -an end-of-life version of Node. Any merge requests or issues supporting an
  -end-of-life version of Node will be closed. We will accept code that allows
  -this package to run on newer, non-LTS, versions of Node. Furthermore, we will
  -attempt to ensure our own changes work on the latest version of Node. To help
  -in that commitment, our continuous integration setup runs the full test suite
  -on the latest release of the following versions of node:
  +We only support [Long-Term Support](https://github.com/nodejs/Release) versions of Node, with the current set of
  +supported versions described in the [`engines` property of the `core` module package.json](https://github.com/BitGo/BitGoJS/blob/master/modules/core/package.json#L18).
  +
  +We specifically limit our support to LTS versions of Node, not because this package won't work on other versions, but
  +because LTS versions tend to be the most widely used in practice. It's possible the packages in this repository will
  +work correctly on newer or older versions of Node, but we typeically don't run automated tests against non-LTS (odd
  +numbered) versions of Node, with the possible exception of the latest odd numbered version for advanced awareness of
  +upcoming breaks in version support.
  +
  +As each Node LTS version reaches its end-of-life we will exclude that version from the node engines property of our
  +package's package.json file. Removing a Node version is considered a breaking change and will entail the publishing of a
  +new major version of this package. We will not accept any requests to support an end-of-life version of Node, and any
  +pull requests or issues regarding support for an end-of-life version of Node will be closed. We will accept code that
  +allows this package to run on newer, non-LTS, versions of Node. Furthermore, we will attempt to ensure our own changes
  +work on the latest version of Node. To help in that commitment, our continuous integration setup runs the full test
  +suite on the latest release of the following versions of node:
  * `10`
  +* `12`
  +* `14`
  +* `15`
  -**Note:** We intend to support the current `lts` (node 12), but it is not currently running due to compability issues with dependencies)
  -
  -JavaScript package managers should allow you to install this package with any
  -version of Node, with, at most, a warning if your version of Node does not fall
  -within the range specified by our node engines property. If you encounter
  -issues installing this package, please report the issue to your package
  -manager.
  +JavaScript package managers should allow you to install this package with any version of Node, with, at most, a warning
  +if your version of Node does not fall within the range specified by our node engines property. If you encounter issues
  +installing this package on a supported version of Node, please report the issue to us.
  # Notes for Developers
  See [DEVELOPERS.md](https://github.com/BitGo/BitGoJS/blob/master/DEVELOPERS.md)
  -
  