Recommend to have protobuf 3.6.1 for CPP code generation (#2399)
Recommend to have protobuf 3.6.1 for CPP code generation (#2399)

More details about this in discussion of PR #2395
google/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber