jaxampler-v0.0.4

The main changes are to modify the samplers for multivariate pdfs and allow shaped arrays to be passed as arguments to rvs.

What's change

• Change in accept reject sampler to sample multivariate distribution by @Qazalbash #9
• Change the design of rvs and the return type by @Qazalbash #10
• Broadcast arrays added by @Qazalbash #11

Full Changelog: v0.0.3...v0.0.4