package.json: Set npm dependencies at fixed versions
package.json: Set npm dependencies at fixed versions

Fixing them at the versions the current tilde ranges expand to.
(e.g. "~0.4.1" -> "0.4.2".)

Change-Id: Ifb30727b4a0f18ca607396876734d97be30bf66d

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui