PyO3 0.14.2

This release is a small quality-of-life update for the PyO3 0.14 release series. Optional support for the indexmap crate has been added. In addition, there have been a number of documentation improvements, and bugfixes for regressions and incorrect FFI definitions.

Users who removed macOS cargo configuration from their setup after updating to PyO3 0.14 will unfortunately have to once again add configuration to their compilation after updating to this release. This is because PyO3 was using functionality which Cargo had erroneously allowed.

The recommended way to restore configuration for macOS is to add a build script which invokes pyo3_build_config::add_extension_module_link_args(). The cargo configuration previously recommended is also still an option.

For full details of all changes, see the CHANGELOG.

Thank you to everyone who contributed code, documentation, design ideas, bug reports, and feedback. The following users' commits are included in this release:

@alex
@awestlake87
@batconjurer
@birkenfeld
@davidhewitt
@deantvv
@Eric-Arellano
@indygreg
@IvanIsCoding
@mejrs
@messense
@nihaals
@tommilligan