Welcome 4 New Committers

[Matthias Boehm]

The Project Management Committee (PMC) for Apache SystemML (SystemDS) 
has invited Arnab Phani, Mark Dokter, Shafaq Siddiqi, and Kevin 
Innerebner to become committers, and we are pleased to announce that all 
four have accepted.

The new committers cover many important areas of current and future 
development such as (1) lineage tracing and reuse, (2) GPU backend and 
code generation, (3) data cleaning pipelines and built-in functions, as 
well as (4) data tensors and federated data preparation and learning.

Congratulations and welcome Arnab, Mark, Shafaq, and Kevin - this is 
well deserved.

Regards,
Matthias