Updates for node-wot 1.x.x

[danielpeintner]

I browsed the code base and I found the following updates we should make before continuing with node-wot 1.x.x

Deprecated

• packages\binding-opcua\src\opcua-protocol-client.ts
  Line 85: /** @deprecated use href instead */

• packages\core\src\helpers.ts
  Line 127: /** @deprecated see https://github.com/eclipse-thingweb/node-wot/issues/1351 */

• D:\projects\WoT\thingweb\thingweb.node-wot-danielpeintner\packages\core\src\servient.ts
  Line 192: * @deprecated use retrieveCredentials() instead which may return multiple credentials

Breaking changes - Issues

• ExposedThing handleUnsubscribeEvent and handleUnobserveProperty should be async #1445
• SecurityType not used anywhere -> remove? #1419

Breaking changes - PRs

• Update CLI implementation with modern tooling and conventions #1456

Did I miss anything?