Fix npm installation error for websocket and scrypt-shim

[cgewecke]

Description

• Use correctly named imports for @web3-js/websocket, @web3-js/scrypt-shim
• Add dependency-check to build step in CI

Fixes #3210

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run test with success and extended the tests if necessary.
• I ran npm run build and tested the resulting file from dist folder in a browser.
• I have tested my code on the live network.

[coveralls]

Coverage remained the same at 84.347% when pulling c516845 on issue/3210 into 79d0aff on 1.x.