Change react/promise constraints to use tilde operator
Merge pull request #138 from reactphp/promise-deps

Change react/promise constraints to use tilde operator
Merge remote-tracking branch 'origin/master' into 0.3

* origin/master:
  Change react/promise constraints to use tilde operator

Conflicts:
	composer.lock
	src/React/Dns/composer.json
	src/React/Stream/composer.json
Merge branch '0.3' into socket-client

* 0.3:
  Change react/promise constraints to use tilde operator
Make promise constraint consistent by using tilde