pin pytorch_lighting to 1.3.8

[chongxiaoc]

Fix compatibility for torch==1.4.0

Signed-off-by: Chongxiao Cao chongxiaoc@uber.com

Checklist before submitting

• Did you read the contributor guide?
• Did you update the docs?
• Did you write any tests to validate this change?
• Did you update the CHANGELOG, if this change affects users?

Description

Fixes # (issue).

Review process to land

1. All tests and other checks must succeed.
2. At least one member of the technical steering committee must review and approve.
3. If any member of the technical steering committee requests changes, they must be addressed.

[github-actions]

Unit Test Results

     741 files  ±0       741 suites  ±0   6h 33m 51s ⏱️ ±0s
     693 tests ±0       650 ✔️ ±0       43 💤 ±0  0 ❌ ±0 
16 485 runs  ±0  11 662 ✔️ ±0  4 823 💤 ±0  0 ❌ ±0 

Results for commit 9378ca5. ± Comparison against base commit 9378ca5.

♻️ This comment has been updated with latest results.

[EnricoMi]

LGTM!

[github-actions]

Unit Test Results (with flaky tests)

     819 files  ±0       819 suites  ±0   6h 47m 39s ⏱️ ±0s
     693 tests ±0       651 ✔️ ±0       42 💤 ±0  0 ❌ ±0 
18 399 runs  ±0  12 862 ✔️ ±0  5 537 💤 ±0  0 ❌ ±0 

Results for commit 9378ca5. ± Comparison against base commit 9378ca5.

♻️ This comment has been updated with latest results.

[EnricoMi]

@chongxiaoc sorry, this still fails on GPU: https://buildkite.com/horovod/horovod/builds/6387

[chongxiaoc]

ok, that's logging function issue.
Let me create a ticket to track.

[chongxiaoc]

here: #3119