Accepting request 990943 from home:dirkmueller:Factory

- update to 21.3:
  * C++
    * Add header search paths to Protobuf-C++.podspec (#10024)
    * Fixed Visual Studio constinit errors (#10232)
    * Fix #9947: make the ABI compatible between debug and non-debug builds (#10271)
  * UPB
    * Allow empty package names (fixes behavior regression in 4.21.0)
    * Fix a SEGV bug when comparing a non-materialized sub-message (#10208)
    * Fix several bugs in descriptor mapping containers (eg. descriptor.services_by_name)
      * for x in mapping now yields keys rather than values, to match Python
        conventions and the behavior of the old library.
      * Lookup operations now correctly reject unhashable types as map keys.
      * We implement repr() to use the same format as dict.
    * Fix maps to use the ScalarMapContainer class when appropriate
    * Fix bug when parsing an unknown value in a proto2 enum extension (protocolbuffers/upb#717)
  * PHP
    * Add "readonly" as a keyword for PHP and add previous classnames to descriptor pool (#10041)
  * Python
    * Make //:protobuf_python and //:well_known_types_py_pb2 public (#10118)
  * Bazel
     * Add back a filegroup for :well_known_protos (#10061)

OBS-URL: https://build.opensuse.org/request/show/990943
OBS-URL: https://build.opensuse.org/package/show/devel:tools:building/protobuf?expand=0&rev=123

protobuf.spec

@@ -27,7 +27,7 @@
 %bcond_without python2
 %bcond_without python3
 Name:           protobuf
-Version:        21.2
+Version:        21.3
 Release:        0
 Summary:        Protocol Buffers - Google's data interchange format
 License:        BSD-3-Clause