Fix type-imports according to the release notes of TypeScript 3.8

[mirismaili]

See: Type-Only Imports and Export

[sdirix]

Hi @mirismaili, thanks for the PR. Can you tell about the motivation? Do you run into problems when not refactoring those specific type imports/exports?

[mirismaili]

Hi @sdirix

Your welcome.

I am trying to add some unsupported features to the library (additionalProperties and patternProperties / #1765) for our business. So I created a dev-project that I can test my changes into the library, quickly (using hot-reload).

My different webpack/typescript configuration (at the dev-project) caused some issues. I fixed them (there) to match JSONForms. But this special case was an issue in JSONForms. So I decided to fix it here.

[mirismaili]

I think the below configuration can be changed after this fix (be applied to all packages):

jsonforms/webpack/webpack.base.js

Line 25 in 6bcdbb1

loaders: [ 'babel-loader', 'ts-loader' ], // first ts-loader, then babel-loader

But I'm not sure.

[sdirix]

@mirismaili The PR conflicts now, can you rebase on latest master?

[mirismaili]

@sdirix
Rebased.

[coveralls]

Coverage decreased (-0.1%) to 85.251% when pulling 779e05e on mirismaili:type-import-export into 81f1f19 on eclipsesource:master.

[sdirix]

LGTM!