deps: update dependency com.google.protobuf:protobuf-bom to v3.16.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.protobuf:protobuf-bom (source)	3.15.8 -> 3.16.0

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Release Notes

protocolbuffers/protobuf

v3.16.0

Compare Source

C++

• Fix compiler warnings issue found in conformance_test_runner #​8189 (#​8190)
• Fix MinGW-w64 build issues. (#​8286)
• [Protoc] C++ Resolved an issue where NO_DESTROY and CONSTINIT are in incorrect order (#​8296)
• Fix PROTOBUF_CONSTINIT macro redefinition (#​8323)
• Delete StringPiecePod (#​8353)
• Fix gcc error: comparison of unsigned expression in '>= 0' is always … (#​8309)
• Fix cmake install on iOS (#​8301)
• Create a CMake option to control whether or not RTTI is enabled (#​8347)
• Fix endian.h location on FreeBSD (#​8351)
• Refactor util::Status (#​8354)
• Make util::Status more similar to absl::Status (#​8405)
• Fix -Wsuggest-destructor-override for generated C++ proto classes. (#​8408)
• Refactor StatusOr and StringPiece (#​8406)
• Refactor uint128 (#​8416)
• The ::pb namespace is no longer exposed due to conflicts.
• Allow MessageDifferencer::TreatAsSet() (and friends) to override previous
  calls instead of crashing.
• Reduce the size of generated proto headers for protos with string or
  bytes fields.
• Move arena() operation on uncommon path to out-of-line routine
• For iterator-pair function parameter types, take both iterators by value.
• Code-space savings and perhaps some modest performance improvements in
  RepeatedPtrField.
• Eliminate nullptr check from every tag parse.
• Remove unused $name$_cached_byte_size fields.
• Serialize extension ranges together when not broken by a proto field in the
  middle.
• Do out-of-line allocation and deallocation of string object in ArenaString.
• Streamline ParseContext::ParseMessage to avoid code bloat and improve
  performance.
• New member functions RepeatedField::Assign, RepeatedPtrField::{Add, Assign}.
• Fix undefined behavior warning due to innocuous uninitialization of value
  on an error path.
• Avoid expensive inlined code space for encoding message length for messages

  = 128 bytes and instead do a procedure call to a shared out-of-line routine.

• util::DefaultFieldComparator will be final in a future version of protobuf.
  Subclasses should inherit from SimpleFieldComparator instead.

C

• Add .NET 5 target and improve WriteString performance with SIMD (#​8147)

Java

• deps: update JUnit and Truth (#​8319)
• Detect invalid overflow of byteLimit and return InvalidProtocolBufferException as documented.
• Exceptions thrown while reading from an InputStream in parseFrom are now
  included as causes.
• Support potentially more efficient proto parsing from RopeByteStrings.
• Clarify runtime of ByteString.Output.toStringBuffer().
• Added UnsafeByteOperations to protobuf-lite (#​8426)

JavaScript

• Make Any.pack() chainable.

Python

• Fix some constness / char literal issues being found by MSVC standard conforming mode (#​8344)
• Switch on "new" buffer API (#​8339)
• Enable crosscompiling aarch64 python wheels under dockcross manylinux docker image (#​8280)
• Fixed a bug in text format where a trailing colon was printed for repeated field.
• When TextFormat encounters a duplicate message map key, replace the current
  one instead of merging.

Objective-C

• Move the class map to a CFDictionary. (#​8328)

PHP

• read_property() handler is not supposed to return NULL (#​8362)
• Changed parameter type from long to integer (#​7613)
• fix: README supported PHP version for C extension (#​8236)

Ruby

• Fixed quadratic memory usage when appending to arrays. (#​8364)
• Fixed memory leak of Ruby arena objects. (#​8461)
• Add support for proto3 json_name in compiler and field definitions. (#​8356)

Other

• Some doc on AOT compilation and protobuf (#​8294)
• [CMake] Ability to pass options to protoc executable from cmake (#​8374)
• Add --fatal_warnings flag to treat warnings as errors (#​8131)
• [bazel] Remove deprecated way to depend on googletest (#​8396)
• add error returns missing from protoc to prevent it from exiting with… (#​8409)

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