- Update to version 1.34.2:
* all: release v1.34.2
* gofeatures: allow setting legacy_unmarshal_json_enum feature at file level
* reflect/protoreflect: FieldDescriptor.Kind should never be GroupKind for maps or fields of map entry
* types/descriptorpb: regenerate using latest protobuf v27.0 release
* internal/impl: fix size cache semantics with lazy decoding
* all: set Go language version to Go 1.20
* reflect/protodesc: remove obsolete JSON name check from desc validator
* all: replace interface{} by any now that we are on Go 1.21
* internal/impl: enable fully lazy extensions (over Size and Marshal)
* all: remove Go 1.17 build tags / workarounds
* all: set Go language version to Go 1.21
* all: start v1.34.1-devel
* all: release v1.34.1
* encoding/proto[json|text]: accept lower case names for group-like fields
* all: update to protobuf 27.0-rc1 and regenerate protos
* all: start v1.34.0-devel
* all: release v1.34.0
* all: fix deprecated
* types/gofeaturespb: move go_feature.proto to be consistent with out languages
* encoding/{protojson,prototext}: strengthen wording on stability
* proto: ensure MarshalOptions are plumbed to all Size calls
* proto: return an error instead of producing invalid wire format
* [proto] use the correct parent when resolving features for extensions
* internal/impl: pass ExtensionTypeDescriptor to extensionMap
* proto: CSE ProtoReflect() and TypeDescriptor() in proto.HasExtension
* protobuf: fix required/group bug in descriptor proto output of editions files
* protobuf: support gaps in edition defaults calculation
* protobuf: fix delimited fields under editions in go
* internal/cmd/generate-types: manual CSE of m.messageInfo() (forwarded request 1190279 from mslacken)