Add leading slash to test in .npmignore (#687) (#690)

(cherry picked from commit 9a2b1cd)

Signed-off-by: Matt Provost <provomat@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Sean Neumann <1413295+seanneumann@users.noreply.github.com>

.npmignore

@@ -4,7 +4,7 @@ reports/
 tmp/
 wiki/
 generator-oui/
-test/
+/test/
 src-docs/
 packages/react-datepicker
 packages/eslint-plugin