$ bundle update rubocop
Fetching gem metadata from https://rubygems.org/..............
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Fetching gem metadata from https://rubygems.org/...........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies....
Bundler could not find compatible versions for gem "parallel":
In snapshot (Gemfile.lock):
parallel (= 1.8.0)
In Gemfile:
rubocop (~> 0.49.1) was resolved to 0.49.1, which depends on
parallel (~> 1.10)
td was resolved to 0.15.2, which depends on
parallel (~> 1.8.0)
Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
Please update the dependent version.