Describe the bug
When registering a block type with more than 3 keywords, the following JS error is logged and the block type is not registered:

The block "xxx" can have a maximum of 3 keywords.

To Reproduce
Steps to reproduce the behavior:

1. Create a basic block type with 4 keywords
2. Check the console log

Expected behavior
The current behavior is too extreme.
The block type should be registered as normal, and WP should use the first 3 keywords ignoring any others if provided. There is also no need for a JS error, or even a warning.