Regenerate .rubocop_todo.yml
Create exception for debugger in cucumber basic steps
Use new-style Rails validations
Replace puts with logger statements
Remove unnecessary variable assignment and return value
Update parallel to version 1.2.3
Update pry to version 0.10.1
Always use rocket in hashes

I found about 500 instances of hashes literals with symbol keys that
used colons and 3000 that used rockets, so I decided to standardize on
rockets. If we decide to change the default, it's relatively easy to
update all instances using RuboCop's auto-correct feature.
Remove unnecessary lambdas
eparate every 3 digits in the integer portion of a number with underscores
Use %w for arrays of words
Enable Regexp rules (excluding cucumber step definitions)
Do not suppress exceptions
Remove useless arguments
Remove space inside hash literal braces

I found about 400 instances of hashes literals with spaces inside braces and
1000 without spaces, so I decided to standardize on no spaces. If we decide to
change the default, it's relatively easy to update all instances using
RuboCop's auto-correct feature.
Remove unnecessary semicolons
Remove redundant self
Use &&/|| instead of and/or
Avoid using {...} for multi-line blocks
Remove redundant returns