0.9.0

As a new semi-major version, this is now the minimum version of awkward for uproot-methods and uproot. It includes

• The first usable version of awkward-numba (jagged arrays only).
• PRs #122 and scikit-hep/uproot3-methods#50, which moves part of the machinery to construct jagged Lorentz vector arrays from jagged arrays into awkward itself.
• A long-standing fix to uproot's Pandas handling, which illegally depended on internals of the JaggedArray class to function. Now the interface is strictly through the public API.