Extended routes that return json doesn't compile
OS: Mac

Nimble:

```
# Dependencies
requires "nim >= 1.0.4", "jester"
```

If I have all code in a single file:

```
import jester, json

routes:
  get "/":
    var jsonResp = $(%*{"id": 2})
    resp Http200, jsonResp

```

It compiles and gets the expected output.

Now if I split this into two files:

`main.nim`

```
import jester
import api

routes:
  extend apiv1, "/api/v1"
```

and `api.nim` ( in the same folder)

```
import jester, json

router apiv1:
  get "/":
    var jsonResp = %*{"id": 2}
    echo jsonResp
    resp Http200, "hello"
```

Then it doesn't compile. The errors are:

```
jester.nim(1277, 9) Hint: Asynchronous route: apiv1. [User]
jester.nim(797, 9) Hint: 'settings' is declared but not used [XDeclaredButNotUsed]
jester.nim(1307, 26) Hint: 'apiv1ErrorHandler' is declared but not used [XDeclaredButNotUsed]
jester.nim(1280, 7) Hint: 'apiv1' is declared but not used [XDeclaredButNotUsed]
jester.nim(1277, 9) Hint: Asynchronous route: match. [User]
jester.nim(1283, 35) template/generic instantiation of `async` from here
/server/src/api.nim(5, 20) Error: undeclared identifier: '%*'
```