apt: st2 -> libssl-dev is conflicting with nodejs-dev -> libssl1.0-dev

SUMMARY

When trying to install npm to be able to add another hubot adapter, I found that installing nodejs-dev (required for npm) would uninstall st2 package

STACKSTORM VERSION

Paste the output of st2 --version: st2 3.1.0, on Python 3.6.9

OS, environment, install method

Ubuntu 18.04.4 LTS, followed official documentation (apt package)

Steps to reproduce the problem

Have a working st2 setup

Run apt install npm

Expected Results

npm package to install without breaking everything

Actual Results

# apt install npm
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  grub-pc-bin libdumbnet1 libjemalloc1
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  gyp libjs-async libjs-inherits libjs-node-uuid libssl1.0-dev libuv1-dev node-abbrev node-ansi node-ansi-color-table node-archy node-async node-balanced-match node-block-stream node-brace-expansion node-builtin-modules
  node-combined-stream node-concat-map node-cookie-jar node-delayed-stream node-forever-agent node-form-data node-fs.realpath node-fstream node-fstream-ignore node-github-url-from-git node-glob node-graceful-fs node-gyp
  node-hosted-git-info node-inflight node-inherits node-ini node-is-builtin-module node-isexe node-json-stringify-safe node-lockfile node-lru-cache node-mime node-minimatch node-mkdirp node-mute-stream node-node-uuid node-nopt
  node-normalize-package-data node-npmlog node-once node-osenv node-path-is-absolute node-pseudomap node-qs node-read node-read-package-json node-request node-retry node-rimraf node-semver node-sha node-slide node-spdx-correct
  node-spdx-expression-parse node-spdx-license-ids node-tar node-tunnel-agent node-underscore node-validate-npm-package-license node-which node-wrappy node-yallist nodejs-dev python-pkg-resources
Suggested packages:
  node-hawk node-aws-sign node-oauth-sign node-http-signature debhelper python-setuptools
The following packages will be REMOVED:
  libssl-dev st2
The following NEW packages will be installed:
  gyp libjs-async libjs-inherits libjs-node-uuid libssl1.0-dev libuv1-dev node-abbrev node-ansi node-ansi-color-table node-archy node-async node-balanced-match node-block-stream node-brace-expansion node-builtin-modules
  node-combined-stream node-concat-map node-cookie-jar node-delayed-stream node-forever-agent node-form-data node-fs.realpath node-fstream node-fstream-ignore node-github-url-from-git node-glob node-graceful-fs node-gyp
  node-hosted-git-info node-inflight node-inherits node-ini node-is-builtin-module node-isexe node-json-stringify-safe node-lockfile node-lru-cache node-mime node-minimatch node-mkdirp node-mute-stream node-node-uuid node-nopt
  node-normalize-package-data node-npmlog node-once node-osenv node-path-is-absolute node-pseudomap node-qs node-read node-read-package-json node-request node-retry node-rimraf node-semver node-sha node-slide node-spdx-correct
  node-spdx-expression-parse node-spdx-license-ids node-tar node-tunnel-agent node-underscore node-validate-npm-package-license node-which node-wrappy node-yallist nodejs-dev npm python-pkg-resources
0 upgraded, 71 newly installed, 2 to remove and 0 not upgraded.
Need to get 4,245 kB of archives.
After this operation, 120 MB disk space will be freed.
Do you want to continue? [Y/n]

When running apt-get in debug mode I can see that there is a conflict :

# apt-get -o Debug::pkgProblemResolver=true install npm
Reading package lists... Done
Building dependency tree
Reading state information... Done
Starting pkgProblemResolver with broken count: 1
Starting 2 pkgProblemResolver with broken count: 1
Investigating (0) st2:amd64 < 3.1.0-3 @ii mK Ib >
Broken st2:amd64 Depends on libssl-dev:amd64 < 1.1.1-1ubuntu2.1~18.04.5 @ii mR >
  Considering libssl-dev:amd64 0 as a solution to st2:amd64 0
  Removing st2:amd64 rather than change libssl-dev:amd64
Done

st2 depends on libssl-dev but nodejs-dev depends on libssl1.0-dev, both versions are conflicting with each others.

I could not find a way to have both installed at the same time to add a new hubot adapter.

Thanks!

Start by reproducing the conflict on Ubuntu 18.04.4 with the documented apt installation and apt install npm, then inspect the reported st2, libssl-dev, nodejs-dev, and libssl1.0-dev dependency relationships. Done means npm and st2 can be installed together without apt removing st2.