Bump protobuf-java from 2.6.1 to 3.13.0 in /java

[dependabot-preview]

Bumps protobuf-java from 2.6.1 to 3.13.0.

Release notes

Sourced from protobuf-java's releases.

Protocol Buffers v3.13.0

PHP

• The C extension is completely rewritten. The new C extension has significantly better parsing performance and fixes a handful of conformance issues. It will also make it easier to add support for more features like proto2 and proto3 presence.
• The new C extension does not support PHP 5.x, which is the reason for the major version bump. PHP 5.x users can still use pure-PHP.

C++

• Removed deprecated unsafe arena string accessors
• Enabled heterogeneous lookup for std::string keys in maps.
• Removed implicit conversion from StringPiece to std::string
• Fix use-after-destroy bug when the Map is allocated in the arena.
• Improved the randomness of map ordering
• Added stack overflow protection for text format with unknown fields
• Use std::hash for proto maps to help with portability.
• Added more Windows macros to proto whitelist.
• Arena constructors for map entry messages are now marked "explicit" (for regular messages they were already explicit).
• Fix subtle aliasing bug in RepeatedField::Add
• Fix mismatch between MapEntry ByteSize and Serialize with respect to unset fields.

Python

• JSON format conformance fixes:
  • Reject lowercase t for Timestamp json format.
  • Print full_name directly for extensions (no camelCase).
  • Reject boolean values for integer fields.
  • Reject NaN, Infinity, -Infinity that is not quoted.
  • Base64 fixes for bytes fields: accept URL-safe base64 and missing padding.
• Bugfix for fields/files named "async" or "await".
• Improved the error message when AttributeError is returned from getattr in EnumTypeWrapper.

Java

• Fixed a bug where setting optional proto3 enums with setFooValue() would not mark the value as present.
• Add Subtract function to FieldMaskUtil.

C#

• Dropped support for netstandard1.0 (replaced by support for netstandard1.1). This was required to modernize the parsing stack to use the Span<byte> type internally. (#7351)
• Add ParseFrom(ReadOnlySequence<byte>) method to enable GC friendly parsing with reduced allocations and buffer copies. (#7351)
• Add support for serialization directly to a IBufferWriter<byte> or to a Span<byte> to enable GC friendly serialization. The new API is available as extension methods on the IMessage type. (#7576)
• Add GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE define to make generated code compatible with old C# compilers (pre-roslyn compilers

Commits

• fde7cf7 Update protobuf version
• 0710535 Fix segment fault for proto3 optional (#7805)
• 2ad43bf Fixed tests for Python 2 in python/release.sh
• 1498286 Removed conflicting C# version line
• 98c2e69 Update protobuf version
• 5ce6232 No need to generate addtional has method for proto2 (#7802)
• d4ca929 Port php c extension to php8 (#7793)
• 008c721 Add docker file for php8.0 (#7790)
• 8947701 Add docker file for php8.0
• 610bbd0 Fixed compile_extension.sh --release to actually enable optimization. (#7766)
• Additional commits viewable in compare view

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