* Update Xcode version needed to run Kokoro tests

* Replace deprecated --no-ri --no-rdoc rubygem options with --no-document

* Register additional handlers from wrappers

* Return zval instead of parse frame

* Use parse frame

* Update upb

* Lazily create wrapper messages

* Fix a segment fault

Need check type of field before getting submsg def

* Avoid expanding during serialization and direct access

* Fix a bug that getXXXUnwrapped returns null for string

* Implement writeWrapperUnwrapped

* Add more tests

* Fix oneof wrapper parsing

* Fix get oneof field

* Avoid expansion for oneof wrappers

* Fix bug

* Fix a bug that in php7 variable is defined out of scope

* Fix broken tests
 * Update upb to fix Timestamp conformance tests
 * Fix segmentation fault for oneof wrapper fields

* Fix encoding/decoding top level wrapper values

* Add type checking for write wrapper value in php7

* Fix zts build

* Fix the bug that readWrapperValue uses parent message's layout to access wrapper value

* Fix wrapper in map

This reverts commit 0c8acb6c.

* upgrade dotnet SDK

* upgrade dotnet SDK version in global.json

Fixes https://github.com/protocolbuffers/protobuf/issues/5335.

protoc.

Move generated test code for Google.Protobuf.Test to a separate lib

if the value was >32bit with the low bits all being zero, it was decoded as
false instead of as true.

Fixes #6863

Bring .NET Framework target down to 4.5
Rename project in comment

Set lang version to C# 3.0
Add .NET Standard 2.0 target
Fix partial diagnostic string since it requires C# 6

Change _Extensions property to normal body rather than expression

Ruby lazy wrappers optimization

C#: Optimize parsing of some primitive and wrapper types

Use 3 parameter Encoding.GetString for default string values

C#: Add microbenchmark for parsing wrapper types

Fix Makefile.am by adding generated files

Fix reflection access when using old generated code

Avoid NullReferenceException when accessing CustomOptions