nix-bitcoin-0.0.42

#339 Misc improvements (@erikarvstedt)
#345 electrs: 0.8.8 -> 0.8.9 (@nixbitcoin)
#347 lightning-loop: 0.12.0 -> 0.12.1 (@nixbitcoin)
#307 Madaidan hardening (@nixbitcoin)
#348 run-tests: add 'vm' command (@erikarvstedt)
#349 elementsd: 0.18.1.9 -> 0.18.1.11 (@nixbitcoin)

Highlights

There is a new preset "hardened-extended" that further improves security at the cost of functionality and performance. It is based on madaidan's Linux Hardening Guide. See the comments at the top of hardened-extended.nix for further details.

In order to enable this, import the corresponding module as shown in examples/configuration.nix:

<nix-bitcoin/modules/presets/hardened-extended.nix>