Turns out .d.tsx is not treated in the same special way as .d.ts.
Source: https://github.com/microsoft/TypeScript/issues/4415

Fixes #6794

Also adds support for .d.tsx files, so that a project
can consistently use .tsx instead of .ts files, everywhere.

Uses @babel/register before loading src/setupProxy to provide TypeScript
support, but only loads @babel/register for the TypeScript template or
any project which has @babel/register as a dependency or devDependency

Co-authored-by: Marc Hassan <marc@unqork.com>

Co-authored-by: Ian Schmitz <ianschmitz@gmail.com>

Co-authored-by: Ian Schmitz <ianschmitz@gmail.com>

This reverts commit c03bb366.

See #7790 for a previous similar PR.

Passing an array with a single entry is not equivalent. This causes Webpack
to generate another wrapper module around the entry. This is just
unnecessary overhead and bytes.

Bumps [acorn](https://github.com/acornjs/acorn) from 6.4.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.4.0...6.4.1

)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Co-authored-by: Ian Schmitz <ianschmitz@gmail.com>