Add package-lock.json
Add package-lock.json

to force base-x to version 3.0.4 because 3.0.5 breaks the build
by exporting ES6.

matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk