Bump rake from 12.3.1 to 12.3.3

Bumps [rake](https://github.com/ruby/rake) from 12.3.1 to 12.3.3. - [Release notes](https://github.com/ruby/rake/releases) - [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc) - [Commits](ruby/rake@v12.3.1...v12.3.3) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -25,7 +25,7 @@ GEM
  rack
  rack-test (1.1.0)
  rack (>= 1.0, < 3)
- rake (12.3.1)
+ rake (12.3.3)
  rspec (3.8.0)
  rspec-core (~> 3.8.0)
  rspec-expectations (~> 3.8.0)