Protobuf: ruby: Support Ruby 2.5.0 on MacOS

[gaffneyc]

Trying to install google-protobuf 3.5.0 with Ruby 2.5.0 on Mac OS returns the following error.

gem install google-protobuf
Fetching: google-protobuf-3.5.0-universal-darwin.gem (100%)
ERROR:  Error installing google-protobuf:
    The last version of google-protobuf (>= 0) to support your Ruby & RubyGems was 3.5.0. Try installing it with `gem install google-protobuf -v 3.5.0`
    google-protobuf requires Ruby version < 2.5, >= 2.0. The current ruby version is 2.5.0.

[gaffneyc]

It looks like 3.5.1 was released yesterday but has the same problem

$ gem install google-protobuf -v 3.5.1
Fetching: google-protobuf-3.5.1-universal-darwin.gem (100%)
ERROR:  Error installing google-protobuf:
        The last version of google-protobuf (= 3.5.1) to support your Ruby & RubyGems was 3.5.1. Try installing it with `gem install google-protobuf -v 3.5.1`
        google-protobuf requires Ruby version < 2.5, >= 2.0. The current ruby version is 2.5.0.

[noctivityinc]

+1 for support for 2.5.0

[gaffneyc]

Version 3.5.1.1 was released yesterday and installs cleanly on MacOS.

[taf2]

This is again an issue with ruby 2.6.0p-1 - is there a good reason to restrict the latest versions of ruby?

grpc-1.10.0-universal-darwin requires ruby version < 2.6, >= 2.0, which is incompatible with the current version, ruby 2.6.0p-1

[alfasin]

Now I'm getting:

google-protobuf-3.5.1-universal-darwin requires ruby version < 2.5, which is incompatible with the current version, ruby 2.5.0p0

[RKushnir]

@alfasin 3.5.1 doesn't support ruby 2.5, try a newer version.