File change notifications delivered via watchman do not work if there are projects specified in .graphqlconfig

[mgadda]

This is a bug that shook out the refactoring to make watchman optional #218. If watchman is installed on the user's system, we need to subscribe the loaded project or projects from .graphqlconfig to file change events. However, it looks like in the case where the .graphqlconfig didn't define any projects, that is, it just contains top-level data about the project, this line blows up because config.getProjects returns undefined.

The simple fix should be:

let projectConfigs: GraphQLProjectConfig[] =
        Object.values(config.getProjects() || {}) || [];

[mgadda]

It looks like my patch above is compiled out of existence by flow.

src/MessageProcessor.js:

Object.values(config.getProject() || {}) || []

in dist/MessageProcessor.js, becomes:

Object.values(config.getProject()) || []