Require hivemind with fixed compression and protobuf working on Colab (#94)

requirements.txt

@@ -3,6 +3,6 @@ bitsandbytes==0.34.0
 accelerate==0.10.0
 huggingface-hub==0.7.0
 transformers==4.21.3
-protobuf>=3.12.2,<4.0.0
-git+https://github.com/learning-at-home/hivemind@8f258b4b3688f671208bf323359cb967b25d640a
+protobuf>=3.12.2,<3.20
+git+https://github.com/learning-at-home/hivemind@1e4af434f35ad43208e7e5df569c5ff5eb79681b
 humanfriendly