docs(svelte): add reference to typescript

Author: camjackson

docs/svelte-testing-library/setup.md

@@ -74,20 +74,10 @@ with any testing framework and runner you're comfortable with.
 
 ## Typescript
 
-In order to support Typescript, you need to enable `preprocess`.
-
-1. Update your jest configuration
-
- ```json
- {
- "jest": {
- "transform": {
- "^.+\\.svelte$": ["svelte-jester", { "preprocess": true }]
- },
- "moduleFileExtensions": ["js", "ts", "svelte"]
- }
- }
- ```
+To use Typescript, you'll need to install and configure `svelte-preprocess` and
+`ts-jest`. For full instructions, see the
+[`svelte-jester` docs](https://github.com/mihar-22/svelte-jester#typescript)
+docs.
 
 ## Babel / Preprocessors