Update Melting Pot to version 2.4.0

PiperOrigin-RevId: 707864717
Change-Id: If03836280a504da4d65202b62f94d4ce60f0e50f

Update Melting Pot version to 2.3.1.

This includes the results of the Melting Pot Competition, NeurIPS 2023.

PiperOrigin-RevId: 648439767
Change-Id: I1688eeb2bd3a5719e6bfdb8dad8b23a004b1d204

Bump version number to v2.3.0

PiperOrigin-RevId: 647353439
Change-Id: I29c217310ed9c820f790edaf54e9b0a813b64cb6

Bump version number to v2.2.2

PiperOrigin-RevId: 617371865
Change-Id: I7992a874b64169ed152126eab64d5b470b317bd6

Pin opencv version to workaround opencv/opencv-python#777

PiperOrigin-RevId: 617338588
Change-Id: I648485038663fe989d21b194c3d863a2ef2f1a77

Bump version number to v2.2.0.

PiperOrigin-RevId: 551014853
Change-Id: I5328942ff822e47593d5f0ebd15902f208e793cb

Update version number to 2.1.1

PiperOrigin-RevId: 516580515
Change-Id: I4c83da7711af52833ef59724d9e3244ba835d7d8

Fix temporary hack to check out a specific version of dmlab2d that wa…

…s erroneously committed into `install.sh`.

PiperOrigin-RevId: 493952136
Change-Id: I49ef3d546546c2f6f9ee826707f5ba4783ce0d51

Release version 2.0.0

#81

PiperOrigin-RevId: 490966899
Change-Id: I7600da4f421ae3385829cc96403ce4824140dcce

Increment version to 1.0.4.

PiperOrigin-RevId: 469510852
Change-Id: Ie04e235d6f17b90e7eba685235c72d0f602926c0