if-not-running (npm): [![npm (scoped)](https://img.shields.io/npm/v/if-not-running.svg)](https://www.npmjs.com/package/if-not-running) [![npm bundle size (minified)](https://img.shields.io/bundlephobia/min/if-not-running.svg)](https://www.npmjs.com/package/if-not-running) [![B
Keywords: concurrency|lock|mutex