chore: Release version 0.12.5

[caspermeijn]

PROST! is a Protocol Buffers implementation for the Rust Language. prost generates simple, idiomatic Rust code from proto2 and proto3 files.

This patch update brings new fixes:

• fix: include_file should handle proto without package (#1002)
• Place Config::format behind the format feature flag
• Handle keyword Self after stripping enum type prefix (#998)

Documentation

• fix(readme): fix the link and badge for CI (#1049)

Internal

• style(codegen): Syntax to a separate file (#1029)
• chore(codegen): extract c string escaping to a separate file (#1028)
• style(prost-build): CodeGenerator::boxed method (#1019)
• style(prost-build): Consolidate field data into struct (#1017)
• style(prost-build): BytesType and MapType into a collections module. (#1030)
• style(prost-build): Split Config and Module into a separate module and files (#1020)
• style(prost-build): prost_path helper (#1018)
• style: Fix toml indent (#1048)
• style: Fix clippy warnings and enable clippy in CI (#1008)
• build: Use git submodule to download protobuf sources (#1014)
• ci: Add TOML validation with taplo (#1034)
• tests: Create a separate tempdir for each test (#1044)
• tests: Remove GoogleMessage3 and GoogleMessage4 benchmarks (#1037)
• chore: Update internal crates to Rust edition 2021 (#1039)
• chore: Update crate descriptions (#1038)
• chore: Fix clippy checks in CI (#1032)
• chore: Add Casper Meijn as author (#1025)

[caspermeijn]

Can you verify this before we merge?

Oops, I should have mentioned that. I noticed it also when I ran cargo semver-checks.

In one of the PRs this was discussed. I am of the opinion that it is OK, as these should have been private in the first place.

Do you agree this is acceptable? If not, I will create a PR to revert it.