Update development gems

[dan-manges]

Making this change ahead of adding support for rspec 3.13. The only remaining issue is with updating selemium.

$ bundle outdated

Fetching https://github.com/rwx-research/rspec-snapshot.git
Fetching gem metadata from https://rubygems.org/.........
Resolving dependencies........

Gem                 Current  Latest  Requested  Groups
rack                2.2.8    3.0.9   ~> 2.2     development
rspec               3.12.0   3.13.0  ~> 3.12    default
rspec-core          3.12.3   3.13.0
rspec-expectations  3.12.4   3.13.0
rspec-mocks         3.12.7   3.13.0
rspec-support       3.12.2   3.13.0
selenium-webdriver  4.10.0   4.18.0  ~> 4.10.0  development