TODOs after major release

[danielpeintner]

This is an umbrella issue meant to collect tasks which should be done after our next major release. In general it is meant to clean-up stuff getting rid of old stuff that has been collected over the years.

• [ ] remove td-tools package (see https://github.com/eclipse-thingweb/td-tools/issues/31)
  • tm-helpers, see https://github.com/eclipse-thingweb/node-wot/issues/1296)
  • td-parser.ts, see https://github.com/eclipse-thingweb/node-wot/pull/1310
  • resolver-interface.ts (exists in td-tools already)
  • td-helpers.ts, see https://github.com/eclipse-thingweb/node-wot/pull/1308
• [ ] ...