Upgrade web3 module

[ts5746]

The Whiteflag API is using v2.0.0-alpha.1 of the web3.js Ethereum JavaScript API. Although this version provides the future API, it is not as well maintained as v1.x. As a result v2.0.0-alpha.1 of the package currently introduces a security vulnerability due to its dependency on the elliptic package. See https://npmjs.com/advisories/1547

Consider reverting to v1.x of the web3.js Ethereum JavaScript API.

[ts5746]

Reverted to v1.2.11 of the web3.js Ethereum JavaScript API. Reviewed all methods and tested Ethereum connectivity and transaction processing. Solution merged into develop with commit 3dfbdfe.