Update rspec-its requirement from ~> 1.3.0 to ~> 2.0.0

Updates the requirements on [rspec-its](https://github.com/rspec/rspec-its) to permit the latest version.
- [Changelog](https://github.com/rspec/rspec-its/blob/main/Changelog.md)
- [Commits](rspec/rspec-its@v1.3.0...v2.0.0)

---
updated-dependencies:
- dependency-name: rspec-its
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

wpscan.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'memory_profiler',     '~> 1.0.0'
   s.add_development_dependency 'rake',                '~> 13.0'
   s.add_development_dependency 'rspec',               '~> 3.13.0'
-  s.add_development_dependency 'rspec-its',           '~> 1.3.0'
+  s.add_development_dependency 'rspec-its',           '~> 2.0.0'
   s.add_development_dependency 'rubocop',             '~> 1.26.0'
   s.add_development_dependency 'rubocop-performance', '~> 1.13.0'
   s.add_development_dependency 'simplecov',           '~> 0.22.0'