Awkward

jpivarski removed `std::cout` from ArrayBuilder and `print` from several of the tests.

ianna migrated ArrayBuilder to the new GrowableBuffer: PR 1542.

Moelf fixed a misleading error message: PR 1544.

martindurant updated `ak.from_parquet` metadata file handling: PR 1476.

henryiii cleaned up dependabot: PR 1518.

ianna set up Awkward's new header-only library: PRs 1523, 1524. Migrated old LayoutBuilder to v2: 1484.

ManasviGoyal developed a new GrowableBuffer, using panels and in a header-only library: PR 1535.

ioanaif fixed pre-commit issues: 1533. Initialized values behind mask in `to_numpy`: PR 1531. Fixed argument lists in deepcopy: PR 1532. Fixed `is_none`'s use of `axis`: PR 1539.

aryan26roy fixed the so-called "endianness bug on Mac" (actually the byte-swap was being optimized away): PR 1538.

jpivarski fixed `RecordArray.__repr__`: PR 1537.

agoose77 fixed the MANIFEST file to include the new src/awkward/_v2/cpp-headers directory (which is the main reason for this pre-release): PR 1516.

jpivarski updated the type-parser for v2: PR 1514.

(Unless otherwise noted, from this release onward, all changes described in release notes are for v2.)

ianna added a one-column implementation of `ak.from_rdataframe`: PR 1508.

jpivarski added `ak._v2.types.from_datashape`, though the parser will need work to make it accept all v2 type strings: PR 1513.

jpivarski silenced a known-to-be-fixed NumPy warning: PR 1464.