tagName not being applied when searching documents.

[berrigan]

It would seem that tagName argument is no longer being applied.

This seems to come from loadAndMergeQueryDocuments (packages/apollo-codegen-core/src/loading.ts) no longer being called in generate (packages/apollo/src/generate.ts).

This can be doubly seen with the tagName parameter to generate no longer being used.

Combined with the regression seen in #706 (comment), it seems impossible to apply document/query searching to a subset of files.

[trevor-scheer]

Thanks for submitting an issue @berrigan! I'm off through the holiday so no promises as to how soon I can get to this but it's next on my list!