Provide keyMirrorPrefix function as a default import 🌸 (#2)

* Provide keyMirrorPrefix function as a default import 🌸

* Bump version 🆙

* Updated README.md 📘

Upgraded key-mirror-prefix 💫 (#1)

* Repo maintenance 🏡

* Repo maintenance 🏚

* Build bundle for commonJS and ES 🏗️

* Convert keyMirrorPrefix to a named export 📛

* Revert testing strategy 🫡

* Test compiled code 🌟

* Only test Node version which Jest supports 😲

* Support `keyMirror` function too 🪞

* Added rimraf to depcheck 🗑️

* Use prepublishOnly script 📦

* Added a PR template 📝

* Use Yarn in build process 🧶

* Updated README.md 📗

* Build before testing bundles 👷🏻‍♂️

Publish 0.0.4 with updated metadata and relevant files ☕️

Export default function 👻

Bump version number 🛰

Added prefix functionality 🚀