Updates for node-wot 1.x.x

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](https://github.com/eclipse-thingweb/node-wot/blob/64ce285012ed4b8a395ee773ab3bd249fc3784d1/packages/binding-opcua/src/opcua-protocol-client.ts#L85)
`Line 85: /** @deprecated use href instead */`

* [packages\core\src\helpers.ts](https://github.com/eclipse-thingweb/node-wot/blob/64ce285012ed4b8a395ee773ab3bd249fc3784d1/packages/core/src/helpers.ts#L127)
`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](https://github.com/eclipse-thingweb/node-wot/blob/64ce285012ed4b8a395ee773ab3bd249fc3784d1/packages/core/src/servient.ts#L192)
`Line 192: * @deprecated use retrieveCredentials() instead which may return multiple credentials`

## Breaking changes - Issues
* https://github.com/eclipse-thingweb/node-wot/issues/1445
* https://github.com/eclipse-thingweb/node-wot/issues/1419

## Breaking changes - PRs
* https://github.com/eclipse-thingweb/node-wot/pull/1456

Did I miss anything?