Use 'export' keyword instead of 'declare' when namespaces are removed

[james-maloney]

Fixes #7

[horiuchi]

How do you need to replace the declare to export?

[james-maloney]

I want to be able to import these types into my code base. Using declare does not allow me to use the generated types when I remove the namespaces. This PR is an attempt to fix this issue. Issue #7 describes the issue well.

I apologize for the formatting changes, those were done by my editor.

[horiuchi]

If you use declare, you can refer to the type without importing it if it is included in the codebase.

But is it easier to use it if you always the export type? If so, I think it would be better to change it in the dtsgenerator itself instead of in this plugin.

[james-maloney]

I think people (me for sure) find it better to explicitly import a type, instead of declare and treating it like a global

[jscarle]

This is a problem. Please fix it so the namespace is exported.