chore: update version

Author: Pedro Pablo Bustamante Barrera

cryptomarket-sdk.gemspec

@@ -3,7 +3,7 @@ $:.push File.expand_path("../lib", __FILE__)
 
 Gem::Specification.new do |s|
   s.name        = "cryptomarket-sdk"
-  s.version     = "3.0.0"
+  s.version     = "3.1.0"
   s.platform    = Gem::Platform::RUBY
   s.authors     = ["T. Ismael Verdugo"]
   s.email       = ["[email protected]"]