Fill in some gemspec details

... more to follow soon.

Author: amomchilov

type_toolkit.gemspec

@@ -8,14 +8,16 @@ Gem::Specification.new do |spec|
   spec.authors = ["Alexander Momchilov"]
   spec.email = ["alexander.momchilov@shopify.com"]
 
-  spec.summary = "TODO: Write a short summary, because RubyGems requires one."
-  spec.description = "TODO: Write a longer description or delete this line."
-  spec.homepage = "TODO: Put your gem's website or public repo URL here."
+  spec.summary = "A minimal runtime library for implementing abstract classes, interfaces, and more."
+  spec.description = <<~DESCRIPTION
+    A minimal runtime library for implementing abstract classes, interfaces, and more.
+  DESCRIPTION
+  spec.homepage = "https://github.com/Shopify/type_kit"
   spec.required_ruby_version = ">= 3.2.0"
 
-  spec.metadata["allowed_push_host"] = "TODO: Set to your gem server 'https://example.com'"
+  spec.metadata["allowed_push_host"] = "https://rubygems.org"
   spec.metadata["homepage_uri"] = spec.homepage
-  spec.metadata["source_code_uri"] = "TODO: Put your gem's public repo URL here."
+  spec.metadata["source_code_uri"] = spec.homepage
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.