* undo apt install libpcre (not circuit-relay related.)
* nat.nim: protect against possible exceptions when calling getExternalIP
* new external CLI argument, isRelayClient
* waku factory change to mount circuit hop proto by default
* waku_node: move autonat_service to a separate module
* bump_dependencies.md: add nim-results dependency
* change imports stew/results to results
* switching to Nim 2.0.8
* waku.nimble: reflect the requirement nim 1.6.0 to 2.0.8
Adding --mm:refc as nim 2.0 enables a new garbage collector that we're
not yet ready to support
* adapt waku code to Nim 2.0
* gcsafe adaptations because Nim 2.0 is more strict