fix(build): fix issue that extends in ts-config.json property is …

[alan-agius4]

Short description of what this resolves:

While typescript support extends of another tsconfig, a limitation in validateRequiredFilesExist method doesn't as it's reading the file using fs, rather than getTsConfig which is a wrapper of the TypeScript API,

Changes proposed in this pull request:

• Impalement getTsConfigAsync method
• In validateRequiredFilesExist use it rather than readFileAsync for the tsconfig.json

Note: I cannot run Unit Tests

Fixes: #745

[alan-agius4]

Bdw, you be good to enable CircleCI to run on PRs, as well
This can be done in here; https://circleci.com/gh/driftyco/ionic-app-scripts/edit#advanced-settings

[alan-agius4]

@danbucholtz any updates?

[danbucholtz]

@alan-agius4,

Can you rebase and submit again? At first glance I would think this would be fine.

Thanks,
Dan

[alan-agius4]

@danbucholtz, just did :)

[danbucholtz]

I see this. Can you fix? I'll test and merge. Please make sure tests pass as well. I updated so they should 🐱 pass on Windows.

Thanks,
Dan

[alan-agius4]

@danbucholtz all tests are green and rebased.

[danbucholtz]

@alan-agius4,

Can you just resubmit this? Github is not letting me merge still.

Thanks,
Dan

[alan-agius4]

@danbucholtz, here's the new PR #910

[danbucholtz]

Thanks, I'll test and merge tomorrow.

Thanks,
Dan