add info on readme on how to install with yarn

[JohnRDOrazio]

NPMJS already tells you how to install with NPM.

However installing with yarn might not be so straightforward.

After quite a bit of fiddling around with an instance of yarn 4 berry, I seem to have finally succeeded in installing from Github packages like this:

yarn add @johnrdorazio/jquery-clock-plugin@https://github.com/johnrdorazio/jquery-clock-plugin

And I'm still not sure how much the following two files had any effect on the installation process:

//.npmrc
registry=https://registry.npmjs.org/
@johnrdorazio:registry=https://npm.pkg.github.com/

//.yarnrc.yml
npmScopes:
  "johnrdorazio":
    npmRegistryServer: "https://npm.pkg.github.com"

However I haven't yet tested implementing within a project just yet.

It certainly is simpler to include from npmjs:

yarn add jquery-clock-plugin

In any case, once it's all tested and implemented, info should be added to the readme.