False alert: TypeScript import type not detected

[sveyret]

Bug Description

Since TypeScript 2.9, it is possible to import only types from a module. See https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-9.html#import-types
These imports are not detected and therefore are creating false alerts.

Code snippets

Where the dependency is used:

import('module').Type

Where the dependency is listed in package.json:

"devDependencies": {
  "module": "x.x.x",
}

Versions

• node -v: any
• npm -v: any
• depcheck --version: 0.8.4

Extra info

It seems that the PR #429 is already correcting this issue. I will provide another PR because I already did the correction in my system (adding a detector), but do not hesitate and discard it if useless.

[rumpl]

There is another PR that was merged for better TS support (#422), it's not perfect yet, needs more work. I'll take a look at yours soon

[sveyret]

Thank you @rumpl.
I already use v0.8.4, which, if I am not mistaken, includes PR #422. It does not correct the issue mentioned here.

[rumpl]

Closed by #445