Consider removing usage of google/protobuf/wrappers and using an in-repo protocol for that

[ChALkeR]

Currently, this library uses one proto file not present in the repo itself: google/protobuf/wrappers.
That protocol is completely trivial: https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/wrappers.proto

It's used directly as google-protobuf/google/protobuf/wrappers_pb.js in a number of places here, but there is a problem with that -- that file has been compiled in commonjs mode instead of commonjs_strict, which brings the same issues with globals pollution and CSP incompatibility. protocolbuffers/protobuf-javascript#25 is related.

protocolbuffers/protobuf#267 is related, and even after the fixes mentioned in protocolbuffers/protobuf#267, it would be still blocked against this one if wrappers.proto is not also recompiled in commonjs_strict mode.

A possible solution would be to replace all direct usage of that compiled js file with a proto file inside this repo, compiled in the same mode as all the other proto files. Perhaps even a subset of that file if not all imports are used.

[mehcode]

It's a little unfortunate that the google provided library isn't compiled in strict mode but I agree a trivial fix is to inline the proto source.

[mehcode]

Done in develop