Bump Google.Protobuf from 3.11.4 to 3.12.0 (#102)

Bumps [Google.Protobuf](https://github.com/protocolbuffers/protobuf) from 3.11.4 to 3.12.0.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/master/generate_changelog.py)
- [Commits](protocolbuffers/protobuf@v3.11.4...v3.12.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

src/common.props

@@ -20,7 +20,7 @@
     <AkkaBootstrapVersion>0.4.0</AkkaBootstrapVersion>
     <AkkaPersistenceExtrasVersion>0.5.0</AkkaPersistenceExtrasVersion>
     <FluentAssertionsVersion>5.10.3</FluentAssertionsVersion>
-    <GoogleProtobufVersion>3.11.4</GoogleProtobufVersion>
+    <GoogleProtobufVersion>3.12.0</GoogleProtobufVersion>
     <PetabridgeCmdVersion>0.8.0</PetabridgeCmdVersion>
   </PropertyGroup>
   <PropertyGroup>