package.json: Pin down terser 3.14.1
package.json: Pin down terser 3.14.1

The recent terser 3.16.0 release causes the build to break with

    TypeError: Cannot read property 'minify' of undefined

(https://github.com/terser-js/terser/issues/251)

Until this is fixed, pin down the version of terser to the previous
known version 3.14.1.

Closes #11105
garrett/cockpit,deryni/cockpit,mvollmer/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,cockpit-project/cockpit,deryni/cockpit,cockpit-project/cockpit,cockpituous/cockpit,deryni/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,martinpitt/cockpit,garrett/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,garrett/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,deryni/cockpit,garrett/cockpit,mvollmer/cockpit,cockpituous/cockpit,deryni/cockpit,deryni/cockpit,mvollmer/cockpit,deryni/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,cockpit-project/cockpit,cockpituous/cockpit,cockpituous/cockpit,cockpit-project/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,garrett/cockpit