add notices of deprecation to gemspec

- post-install message
- updating summary and description

related to #83

chromedriver-helper.gemspec

@@ -3,32 +3,45 @@ $:.push File.expand_path("../lib", __FILE__)
 require "chromedriver/helper/version"
 
 def windows?
-  RbConfig::CONFIG['target_os'] =~ /mingw32|mswin/
+  RbConfig::CONFIG["target_os"] =~ /mingw32|mswin/
 end
 
 Gem::Specification.new do |s|
-  s.name        = "chromedriver-helper"
-  s.version     = Chromedriver::Helper::VERSION
-  s.authors     = ["Mike Dalessio"]
-  s.email       = ["[email protected]"]
-  s.homepage    = "https://github.com/flavorjones/chromedriver-helper"
-  s.summary     = "Easy installation and use of chromedriver."
-  s.description = "Easy installation and use of chromedriver, the Chromium project's selenium webdriver adapter."
-  s.licenses    = ["MIT"]
+  s.name = "chromedriver-helper"
+  s.version = Chromedriver::Helper::VERSION
+  s.authors = ["Mike Dalessio"]
+  s.email = ["[email protected]"]
+  s.homepage = "https://github.com/flavorjones/chromedriver-helper"
+  s.summary = "Deprecated in favor of the 'webdrivers' gem."
+  s.description = "Deprecated in favor of the 'webdrivers' gem as of 2019-03-31. See https://github.com/flavorjones/chromedriver-helper/issues/83"
+  s.licenses = ["MIT"]
+
+  s.post_install_message = <<EOM
+
+  +--------------------------------------------------------------------+
+  |                                                                    |
+  |  NOTICE: chromedriver-helper is deprecated after 2019-03-31.       |
+  |                                                                    |
+  |  Please update to use the 'webdrivers' gem instead.                |
+  |  See https://github.com/flavorjones/chromedriver-helper/issues/83  |
+  |                                                                    |
+  +--------------------------------------------------------------------+
+
+EOM
 
   begin
-    s.files         = `git ls-files`.split("\n")
-    s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-    s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+    s.files = `git ls-files`.split("\n")
+    s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
+    s.executables = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   rescue Exception => e
     warn "WARNING: could not set spec.files: #{e.class}: #{e}"
   end
   s.require_paths = ["lib"]
 
-  s.add_development_dependency "rspec",     "~> 3.0"
-  s.add_development_dependency "rake",      "~> 10.0"
+  s.add_development_dependency "rspec", "~> 3.0"
+  s.add_development_dependency "rake", "~> 10.0"
   s.add_development_dependency "concourse", "~> 0.23"
 
-  s.add_runtime_dependency "nokogiri",      "~> 1.8"
-  s.add_runtime_dependency "archive-zip",   "~> 0.10"
+  s.add_runtime_dependency "nokogiri", "~> 1.8"
+  s.add_runtime_dependency "archive-zip", "~> 0.10"
 end