app-text/typst: run tests for all rust packages

typst has integration tests in a subdir and there was no test in
crates/typst-cli so the ebuild previously didn't test much.

Signed-off-by: odrling <florianbadie@odrling.xyz>

app-text/typst/typst-0.11.1.ebuild

@@ -409,3 +409,7 @@ src_install() {
 
 	einstalldocs
 }
+
+src_test() {
+	cargo_src_test --workspace
+}