scikit-hep/uproot: 3.4.0

Updated dependence to awkward 0.8.0 and uproot-methods 0.4.0. Since one can now use awkward.JaggedArray or awkward.numba.JaggedArray, all of the array-fetching functions now have an awkwardlib parameter where you can specify awkwardlib="awkward.numba" (as a string or a module object). When awkward.cuda exists, this will be the mechanism for reading data directly from ROOT files onto GPUs with CuPy