chore: Update tomlrb requirement from ~> 1.1 to >= 1.1, < 3.0 (#886)

Updates the requirements on [tomlrb](https://github.com/fbernier/tomlrb) to permit the latest version.
- [Release notes](https://github.com/fbernier/tomlrb/releases)
- [Changelog](https://github.com/fbernier/tomlrb/blob/master/CHANGELOG.md)
- [Commits](fbernier/tomlrb@v1.1.0...v2.0.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

appium_lib.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency 'appium_lib_core', '~> 4.1'
   s.add_runtime_dependency 'nokogiri', '~> 1.8', '>= 1.8.1'
-  s.add_runtime_dependency 'tomlrb', '~> 1.1'
+  s.add_runtime_dependency 'tomlrb', '>= 1.1', '< 3.0'
 
   s.add_development_dependency 'appium_thor', '~> 1.1', '>= 1.1.4'
   s.add_development_dependency 'fakefs', '~> 1.3.0'