v0.4.0

Fixes:

• Made the call to get schema on server startup async - ad93ac4
• Made server options and executableSchema public - b16d1ea

Documentation Updates:

• Added middleware usage documentation to README - a1b6aa1

Dependency Updates:

• graphql to ^0.12.0
• apollo-link to ^1.0.7
• apollo-server-express to ^1.3.1
• graphql-subscriptions to ^0.5.6
• graphql-tools to ^2.14.0

Special thanks to @playerx and @kbrandwijk for contributing to this release 🎉