Create pyproject.toml

[albapa]

This appears to be the same installation problem as here rusty1s/pytorch_cluster#208 with the same solution.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.23%. Comparing base (140d3ad) to head (b16ffa7).
Report is 4 commits behind head on master.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #441   +/-   ##
=======================================
  Coverage   97.23%   97.23%           
=======================================
  Files          10       10           
  Lines         217      217           
=======================================
  Hits          211      211           
  Misses          6        6           

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[rusty1s]

Thank you.