Manually resolve broken net-smtp dependency

[pablobm]

After merging #2440, I saw strange CI failures. Looking into it, they don't appear to be related to the PR, but I can't really explain them.

One is related to Ruby 3.3. For some reason, a transitive dependency that wasn't necessary before is needed now? And running bundle update net-smtp simply added it? Beats me.

The other was an issue with Rails 6.x. Looking it up, I found this discussion at StackOverflow. Requiring logger at the right place appears to fix it...?

Additionally, Appraisal seems to be doing something wrong in my computer (tested in macOS) and as a result I can't run some appraisals. See:

$ irb
irb(main):001> require 'mutex_m'
=> true
irb(main):002>

$ bundle exec appraisal rails80 irb
>> BUNDLE_GEMFILE=/Users/pablobm/Documents/personal/administrate/gem/gemfiles/rails80.gemfile bundle exec irb
irb(main):001> require 'mutex_m'
<internal:/Users/pablobm/Documents/personal/laptop/repos/asdf/installs/ruby/3.4.1/lib/ruby/3.4.0/rubygems/core_ext/kernel_require.rb>:37:in 'Kernel#require': cannot load such file -- mutex_m (LoadError)
...

Any ideas of what that could be?

[nickcharlton]

Ah, nice. Yeah, I'd been seeing the net-smtp problem on a few things, but couldn't track down what a solution was.

Annoyingly, I can't reproduce the Appraisal issue:

$ be appraisal rails60 irb
>> BUNDLE_GEMFILE=/Users/nickcharlton/projects/thoughtbot/administrate/gemfiles/rails60.gemfile bundle exec irb
irb(main):001>

[nickcharlton]

I broke out the logger problem into #2765.

I'm not sure about the Appraisal problem. I've seen a few weird issues now and again, but it's very tricky to get to the bottom of it.