Liesel v0.3.0

This is a big update!

Major changes

• New constructors for lsl.Var: lsl.Var.new_param, lsl.Var.new_obs, lsl.Var.new_calc, lsl.Var.new_value by @jobrachem in #201
• Easier access to and manipulation of node inputs via square-bracket syntax by @jobrachem in #202
• Introducing lsl.Var.transform: Supersedes lsl.GraphBuilder.transform by @jobrachem in #174
• gs.optim_flat: A function for applying stochastic gradient descent to a simple Liesel model by @jobrachem in #175
• Rename lsl.Data -> lsl.Value by @jobrachem in #170
• Add helper functions to define B-spline bases and penalty matrices by @GianmarcoCallegher and @jobrachem in #203

Minor changes

• Enable progress bar for MCMC sampling in Jupyter notebooks by @jobrachem in #208
• Warn about missing PyGraphviz installation when plotting a lsl.Model by @jobrachem in #209
• Avoid hardcoded conversion to float32 in GraphBuilder by @jobrachem in #204
• Update logging setup by @jobrachem in #187
• Turn off update_on_init for special model nodes by @jobrachem in #186
• Fixed unexpected behaviour in plot_vars when using an intermediate Calc by @GianmarcoCallegher in #168

Maintenance

• Remove filter warnings from pyproject by @GianmarcoCallegher in #190
• Fix tutorials by @jobrachem in #191
• Update docs base URL handling by @jobrachem in #197
• Unpin scipy by @jobrachem in #198
• Update graph plots in docs by @jobrachem in #200

Full Changelog: v0.2.9...v0.3.0