package.json: Update qunit package dependency
package.json: Update qunit package dependency

Closes #14886

mvollmer/cockpit,garrett/cockpit,mvollmer/cockpit,garrett/cockpit,martinpitt/cockpit,martinpitt/cockpit,mvollmer/cockpit,deryni/cockpit,cockpit-project/cockpit,garrett/cockpit,deryni/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,martinpitt/cockpit,garrett/cockpit,cockpit-project/cockpit,deryni/cockpit,cockpit-project/cockpit,garrett/cockpit,mvollmer/cockpit,deryni/cockpit,deryni/cockpit,deryni/cockpit,cockpit-project/cockpit,martinpitt/cockpit,deryni/cockpit