* Add api-fetch dependency
* Remove compiled files from the repo
* Update build process, remove grunt
* Import CSS into block, as we now extract CSS via webpack to build
* Update enqueue scripts to reflect new build locations
* Detect if build files don’t exist, and instruct users to build project
* Update readme with build instructions
* Clarify where to run npm commands in info notice
* Only enqueue our JS files if we know they exist
* Clarify version compatibility between WC and WP 5.0
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