[Bug] [ruby] (<<= , |= , &=) Unrecognized Operator

[DavidBakerEffendi]

Describe the bug
It appears <<= is being determined as an operator. While this may be a call in practice, this is worth investigating before determining if this should be a call or not. This is reproducible on mastodon.

 Unrecognized assignment operator: id <<= 16 (lib/mastodon/snowflake.rb)

The same goes for &= and |=.

To Reproduce
Steps to reproduce the behavior:

1. git clone [email protected]:mastodon/mastodon.git --depth 1
2. joern-parse mastodon
3. See error