Dropped support for Pythons 2.7 and 3.5: PR #1182. From now on, Awkward Array only supports Python 3.6 and up. @henryiii added Python 3.10 to testing: PR #1186. Bumped pybind11 to version 2.8.0: PR #1011. To 2.9.0: PR #1199. Included a Numba release candidate for Python 3.10: PR #1188. @ianna replaced std::shared_ptr with std::unique_ptr in ArrayBuilder and also removed a pointer assignment from a hot loop for a performance increase: PR #1155. Added diagrams for future tutorials: PR #948. @agoose77 improved ak.packed to additionally project IndexedArrays: PR #1195. @BioGeek fixed a typo in the documentation: PR #1187. @jpivarski fixed a bug in ak.unflatten: PR #1178. Added an exception for an unworkable case in ak.unzip: PR #1179. Fixed ak.to_numpy with RegularArray of size zero and non-zero length: PR #1180. Fixed NumpyArray::numbers_to_type: PR #1175. Fixed zeros in RegularArray shape: PR #1181. Fixed a typo: PR #1172. Removed distutils dependence: PR #1196. Fixed ak.singletons for non-optional data: PR #1197. Extended the default case of NEP 18 to allow arguments to be non-array iterables: PR #1198. Improved an error message in Content::axis_wrap_if_negative: PR #1202. Filled ak._v2 with the symbols that will eventually be in ak: PR #1208. Version 2 development: @jpivarski simplified type-tracers, so they no longer try to know their lengths: PR #1183 and #1184. Implemented v2 to_list and switched all v2 tests to use it: PR #1201 and #1203. Ensured that v2 to_numpy is done: PR #1204. Fixed up reducers (including non-reducers) and moved a lot of tests from v1 to v2: PR #1206.