Bumping version to rc1
MODIFY
versions/3.0.md
versions/3.0.md
# OpenAPI Specification
-#### Version 3.0.0-rc0
+#### Version 3.0.0-rc1
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC 2119](http://www.ietf.org/rfc/rfc2119.txt).

Bumping version to rc1