Union types may be considered as reffedTypes

[NPellet]

Subtypes of unions should be considered eligible for asTypeAliasRef in getTypeDefinition

e.g.

type A = {
  "prop": string
}

type B = {
  "prop": string,
  "refToA"?: A | null 
}

should return a reference to A when compiled with --aliasRefs

PS: Sorry for the changes introduced by prettier...

[domoritz]

Thank you. Please remove the npm lock file.

[NPellet]

Sorry, screwed up my last commit.

Coming up