updated gemspec for better info messages, min-ruby-version requirement

updated travis.yml per ManageIQ/optimist#110

.travis.yml

@@ -1,13 +1,14 @@
 language: ruby
-sudo: false
+cache: bundler
 rvm:
-  - "2.2"
-  - "2.3.4"
-  - "2.5.1"
-  - "2.6.3"
-  - "2.7.0"
+  - 2.2
+  - 2.3
+  - 2.4
+  - 2.5
+  - 2.6
+  - 2.7
   - jruby-head
 matrix:
   allow_failures:
-    - rvm: jruby-head
-  fast_finish: true
+#    - rvm: jruby-head
+#  fast_finish: true

optimist_xl.gemspec

@@ -9,9 +9,9 @@ Gem::Specification.new do |spec|
   spec.version       = OptimistXL::VERSION
   spec.authors       = ["William Morgan", "Keenan Brock", "Jason Frey", "Ben Bowers"]
   spec.email         = "nanobowers@gmail.com"
-  spec.summary       = "OptimistXL is a commandline option parser for Ruby that just gets out of your way."
-  spec.description   = "OptimistXL is a commandline option parser for Ruby that just
-gets out of your way. One line of code per option is all you need to write.
+  spec.summary       = "OptimistXL is feature fork of the Optimist commandline option parser."
+  spec.description   = "OptimistXL is feature filled but lightweight commandline option parser.
+One line of code per option is all you typically need to write.
 For that, you get a nice automatically-generated help page, robust option
 parsing, command subcompletion, and sensible defaults for everything you don't
 specify.  This gem is an enhanced-feature fork of the Optimist gem."
@@ -29,6 +29,8 @@ specify.  This gem is an enhanced-feature fork of the Optimist gem."
 
   spec.require_paths = ["lib"]
 
+  spec.required_ruby_version = '>= 2.2'
+
   spec.add_development_dependency "minitest", "~> 5.4.3"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "chronic"