Replace deprecated `node-webcrypto-ossl ` with `webcrypto`

The package `node-webcrypto-ossl ` has been deprecated. The recommended replacement is [webcrypto](https://github.com/PeculiarVentures/webcrypto). Background info can be found in the node-webcrypto-ossl repo [here](https://github.com/PeculiarVentures/node-webcrypto-ossl#deprecated).