rel-2.0.9

The following changes were made in this release:

• Explicitly add gcc DLL directory on Windows for Python >= 3.8
• Added chi-squared RandomVariable
• Fixed an attribute error in Scan's exception handling
• Reverted FunctionGraph replacement warnings
• Renamed aesara.graph.toolbox to aesara.graph.features
• Moved is_same_graph_with_merge and is_same_graph to aesara.graph.opt_utils
• Added aesara.graph.opt_utils.optimize_graph function to simplify running optimizations/rewrites on graphs
• Added atleast_*d and expand_dims functions
• Added broadcast_arrays function
• Renamed Query to OptimizationQuery and DB to OptimizationDatabase
• Exposed aesara.tensor.random.basic via aesara.tensor.random, so, now, random variables can be created via import aesara.tensor as aet; aet.random.*
• NumPy dtype objects (e.g. np.int32, np.float64) can be used when specifying dtypes to tensor and scalar construction functions and cast