Add vue as supported language to extract gql

[kestred]

Adds support for vue. Uses the same extracter as typescript/javacript/ ___react.

Just works by adding to list of supported languages.

TODO:

• Update CHANGELOG.md* with your change (include reference to issue & this PR)
• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests and linter rules pass

[apollo-cla]

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[trevor-scheer]

@kestred this is great, thanks for adding this! If you can spare the effort, would you mind adding vue support here in the same way? If not, just let me know and I'll take care of it!

apollo-tooling/packages/vscode-apollo/src/languageServerClient.ts

Line 42 in 177f427

documentSelector: [

Note the file watcher regex a few lines below as well.

[kestred]

@trevor-scheer: added

[kestred]

Question/Aside: @trevor-scheer - Is it the case that the vscode plugin (that package you had me update) will watch the files and automatically regenerate the types whenever they change?

[trevor-scheer]

@kestred thanks for the quick turnaround. Merging this now!

Which types do you mean?

I can tell you we currently don't update any typescript types a la codegen.
The change I requested should just ensure that vscode notifies the language server of any changes to files it should be interested in. The language server will then respond accordingly with hooks like this one:

apollo-tooling/packages/apollo-language-server/src/server.ts

Line 127 in 177f427

connection.onDidChangeWatchedFiles(params => {