fix dependency versions in pubspecs
Merge pull request #260 from yjbanov/fix-pubspecs

fix dependency versions in pubspecs
Merge remote-tracking branch 'upstream/master' into dependencies
Some formatting fixes.
Merge pull request #255 from alxhub/dependencies

Add support for .proto imports and dependencies between Streamy clients.
Merge remote-tracking branch 'upstream/master' into proto-rpc