v0.9.4 release

We are releasing the v0.9.4 version now! In v0.9.4, we add 6 hypergraph datasets and fix some known bugs.

New Datasets:

• DBLP-4k @yifanfeng97
• IMDB4k @yifanfeng97
• Recipe100k @yifanfeng97
• Recipe200k @yifanfeng97
• Yelp3k @yifanfeng97
• Tencent2k @yifanfeng97

Fix bugs:

• fix last layer bn bugs @yifanfeng97
• fix device error of graph,di_graph,bi_graph,hypergraph laplacian computing @yifanfeng97

New features:

• add custom hypergraph generator @yifanfeng97