test: ✅ add read_register() test with .parq extension (#183)

# Description

Needs no review. 

## Checklist

- [X] Ran `just run-all`

Author: signekb

tests/testthat/test-read.R

@@ -93,3 +93,9 @@ test_that("non-Parquet file returns error", {
 
   expect_error(read_register(temp_txt_file), temp_txt_file)
 })
+
+test_that("files with extension .parq can also be read", {
+  path <- fs::path_temp("file.parq")
+  arrow::write_parquet(simulate_register("kontakter")[[1]], sink = path)
+  expect_no_error(read_register(path))
+})