Update rspec-its requirement from ~> 1.2.0 to ~> 1.3.0

Updates the requirements on [rspec-its](https://github.com/rspec/rspec-its) to permit the latest version.
- [Release notes](https://github.com/rspec/rspec-its/releases)
- [Changelog](https://github.com/rspec/rspec-its/blob/master/Changelog.md)
- [Commits](https://github.com/rspec/rspec-its/compare/v1.2.0...v1.3.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

wpscan.gemspec

@@ -28,7 +28,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'memory_profiler', '~> 0.9.13'
   s.add_development_dependency 'rake', '~> 12.3'
   s.add_development_dependency 'rspec', '~> 3.8.0'
-  s.add_development_dependency 'rspec-its', '~> 1.2.0'
+  s.add_development_dependency 'rspec-its', '~> 1.3.0'
   s.add_development_dependency 'rubocop', '~> 0.67.1'
   s.add_development_dependency 'simplecov', '~> 0.16.1'
   s.add_development_dependency 'stackprof', '~> 0.2.12'