I remove my Gemfile.lock, change my gem 'rails', '5.2'
to gem 'rails', '6.0'
and do bundle install.
I get a lot of dependency errors. But I cannot understand them because they seem okay.
I was getting errors like this:
Bundler could not find compatible versions for gem "pry":
In Gemfile:
guard-rspec (~> 4.7.0) was resolved to 4.7.3, which depends on
guard (~> 2.1) was resolved to 2.16.2, which depends on
pry (>= 0.9.12)
pry-doc was resolved to 1.1.0, which depends on
pry (~> 0.11)
pry-nav was resolved to 0.3.0, which depends on
pry (>= 0.9.10, < 0.13.0)
pry-rails was resolved to 0.3.9, which depends on
pry (>= 0.10.4)
and a lot more.. seems in the above that the dependencies should be fine, i.e. 0.11 for pry-doc is greater than all the others and they all specify greater than or equal.