Always load version.rb, suppress legacy deprecation warning

Author: vlad-pisanov

contracts.gemspec

@@ -13,8 +13,11 @@ Gem::Specification.new do |s|
   s.homepage    = "https://github.com/egonSchiele/contracts.ruby"
   s.license     = "BSD-2-Clause"
   s.required_ruby_version = [">= 3.0", "< 4"]
-  s.post_install_message = "
-    0.16.x will be the supporting Ruby 2.x and be feature frozen (only fixes will be released)
-    For Ruby 3.x use 0.17.x or later
-  "
+
+  if Contracts::VERSION < "0.17"
+    s.post_install_message = "
+      0.16.x will be the supporting Ruby 2.x and be feature frozen (only fixes will be released)
+      For Ruby 3.x use 0.17.x or later
+    "
+  end
 end

lib/contracts.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require "contracts/version"
 require "contracts/attrs"
 require "contracts/builtin_contracts"
 require "contracts/decorators"